At the Okinawa training camp, Yukimura and Himuro shared a kiss of the highest theoretical value on a bridge of the greatest mood value under the beautiful, painterly rays of the morning sun. But the amount of saliva they collected was insufficient and so retesting is required. They head to the biological sciences' Regulation of Biological Systems Department to meet with a specialist in saliva testing. There, they find an alluring woman dressed like a traditional courtesan wearing a lab coat, Suiu, and her sweetheart, Chris. When Yukimura asks Suiu and Chris to help with their experiment to "give proof of love," Chris and Suiu flaunt their overwhelming aura of love.
On their way to liberate Camelot, Meliodas tells his comrades about the curse that two deities put upon him and Elizabeth 3,000 years ago.Watch Now:Amazon
With Wild now an ally, Meliodas brings Zeldris' tragic past to light as the newly formed trio make their way towards the Demon King.
It's a lazy day at Souta's house when Nakajima abruptly reveals that his mother guilted him into agreeing to a marriage interview. He's thirty and still single, and Souta's stuck in the same boat. Rinko on the other hand is already married, but not exactly a perfect homemaker. So when she offers to make the boys lunch, they realize she's acting strange...Watch Now:Amazon
Even after losing the duel, Glenn lacks all motivation. Yet through his interactions with Sistine and Rumia, he eventually starts genuinely teaching classes that will help them. Meanwhile, suspicious men show up at the academy…Watch Now:Amazon
Meliodas grapples with suddenly losing his memories of Estarossa. Zeldris, Chandler and Cusack threaten to overpower Merlin and the others.
At Kanade's suggestion, the first "Ikeda Lab Science-type Girls' Night Out" is held at a family restaurant, but Himuro and Ibarada, who are both uncomfortable around people, start talking about their experiences of being all alone. Kanade attempts to liven up the mood with some girl talk about romance, asking Himuro what she likes about Yukimura, but Himuro then pulls out some documents and begins to analyze them in a matter-of-fact manner. Later, Kosuke attends a concert and waves his penlight furiously for Aika's voice actress, Hinamori Ren. When he looks behind him, he sees Ibarada and Himuro!
Yukimura and Himuro allow Yamamoto to turn their experiences thus far into a manga and Yamamoto collects proof of love from her readers in return. The manga becomes very popular. Yamamoto, pleased with herself, says that an anime adaptation may not be just a dream. In the meantime, Kanade, still bothered by the love she experienced back in high school, gives some hard thought to the confession she received from Shikijou. Seeing Kanade so full of anxiety over the question, "what is love anyway," Yukimura tries to give her some advice and pulls out a whiteboard where he begins to write out an equation.
It's time for the school cultural festival! Excitement is in the air as life seems to be back to normal for Seiji, Akane, and the rest, but all is not what it seems. Shikimi suddenly has transferred into Seiji's class and it now has Akane on edge. When its decided that their class will be putting on a play with Shikimi in the leading role of the princess Akane is roped into playing the prince while Guri gets to play the rival pirate to the prince. On top of all this even Yuzu has started acting strangely and Seiji finds himself stuck in the middle, as always.Watch Now:Amazon
Though Yukimura and Himuro went as far as to kiss for the experiment, they were soundly beaten by Chris and Suiu's oxytocin levels in their saliva. Panicked, Yukimura suggests that they conduct control experiments. However, in the midst of the Yukimura/Suiu pairing, Suiu's seductive manner ends up causing Yukimura to ogle her charms. Seeing that, Himuro runs another experiment with Yukimura, but ends up sulking. The two end up having a lover's quarrel. Yukimura's behavior causes Chris to look down at him coldly and say, "As a man, you are a failure."
Even after Professor Ikeda recommends that Ibarada proceed on a doctoral course, she can't make up her mind about what she wants to do. But after experiencing a little of Professor Ikeda's deep love for strength training, she strives to complete some sit ups, an activity she isn't used to doing, on the sofa. As she does, Kosuke looks on in fascination. Meanwhile, Himuro has caught a cold due to the changing of the seasons. Worried for her, Yukimura goes to her apartment to check on her, but the flush and heat of her fever has given her a coquettish appearance that sends Yukimura's heart racing. At that very moment, Kanade shows up and Himuro promptly hides Yukimura under her comforter.
Yukimura is working hard on his computer, as usual, when Himuro suddenly says, "I am in love with you. Her confession greatly shakes Yukimura. Unlike the last time, Himuro states her feelings matter-of-factly. Yukimura asks, "What theory did you use to determine that you love me?" Himuro replies by taking Yukimura out on a date and begins performing experiments they've done before such as measuring heart rates, using an emotion counter, collecting saliva, and the kiss experiment.
Gowther reveals that his creator, the real Gowther, cast a forbidden spell on Mael and all those who knew him to end the Holy War 3,000 years ago.
Meliodas and the others have to defeat the Demon King before they can escape Purgatory and make their way to the world of the living.Watch Now:Amazon
Reunited once again, Ban and Meliodas prepare to face the Demon King, who they suspect holds the key to their escape from purgatory.
Souta takes Poco on a trip to Shodoshima, where he's to meet with the company his former boss put him in touch with. When they get to the office, the boss is out, so it's time for some sightseeing. But when Souta dozes off, he wakes up to a nightmare...Watch Now:Amazon
Chandler, Meliodas' former mentor, aids Zendris. He infiltrates the Boar Hat to capture Meliodas, but the Deadly Sins stand in his way.Watch Now:Amazon
The original Gowther comes to Diane and King with a request. King learns of a human revolt against Stigma and rushes to Gerheade's aid.Watch Now:Amazon
The party heads to the city of Coland to dispel the distortion protecting Camelot. When Meliodas is trapped in darkness, they must fight without him.
Estarossa professes his love for Elizabeth. When he loses control after absorbing three of the Commandments, Stigma's army faces him in a final battle.
Meliodas disbands the Deadly Sins and departs with Elizabeth. But his companions aren't going to let him go without a fight, and Hawk holds the key.Watch Now:Amazon
Arthur's battle with Cath comes to an epic conclusion. The Seven Deadly Sins go their separate ways as peace returns to the world once again.
Sensing Elizabeth's magic, Derieri appears before the Stigma army. Estarossa follows her, but Sariel and Tarmiel have other plans for him.Watch Now:Amazon
Souta calls Nakajima out, saying he needs to ask him for a favor. Buttering his longtime friend up with some bone-in chicken, he asks Nakajima to go with him to shoot a video for a class reunion. The two return to their old high school, talk with a teacher they used to have makeup lessons with, and end up reminiscing about the good old days. Souta reveals that he accepted the video project because, after leaving for Tokyo caused him to lose touch with the people of his hometown, he wants to revitalize that connection however he can. That evening, it’s Nakajima’s turn to ask Souta for a favor: to go with him to visit his father, who’s been hurt badly...Watch Now:Amazon
The new Holy War commences as the allied forces of Stigma face off against the Demon Clan. Derieri decides to surrender her Commandment to Zeldris.
Zeldris and the Sins corner the Demon King in both realms, but the King separates from his son's body and possesses Britannia itself as his new vessel.Watch Now:Amazon
The Ikeda Lab is, as is traditional, doing something for the university's Mutsumi Festival, an event which draws many people from off-campus. Yukimura proposes conducting a large-scale experiment on the importance of appearance for romance. He has readied a large number of cosplay costumes to rent out to visitors who will then participate in an attractiveness rating. In order to emphasize how important appearance is, Yukimura projects a series of images of Himuro in cosplay on the screen, including Himuro in a nurse's uniform, a maid's uniform, and a black cat style outfit?!
Ban searches purgatory for Meliodas. King, Deriri and the others head to Heaven's Theater to rescue Elizabeth, who's been abducted by Estarossa.Watch Now:Amazon
King and Diane take refuge in the Fairy King's Forest to escape the Ten Commandments. But Gloxinia and Drole find them after a peaceful interlude.
When Himuro finds out that Yukimura spends time alone in a room with a high school girl for his part-time home tutoring job, she becomes intensely worried that he might be ogling his student. That student, Haru, isn't good at studying. Her average score on her end of term exams was 38 points. When Yukimura personally witnesses Haru's father disparaging her as a failure, he... Later, the Mutsumi Festival begins and twin sister cosplayers who are brimming with youthful energy arrive at the Ikeda Lab's cosplay experience.
Merlin faces Zeldris, whom Meliodas has ordered to gather the Commandments. Margaret, Hendrickson and Dreyfus continue their search for Gilthunder.Watch Now:Amazon
After worrying long and hard over what to do about Shikijou's invitation to go hang out together, Kanade decides to try going on the date with him. When Himuro hears about it she leans forward excitedly to congratulate Kanade on finding someone she might fall in love with. Himuro is also eager to observe and analyze Kanade's date from afar in order to put it to good use in her own research. As she's thinking about this, Yukimura arrives and proclaims that he has devised a new standard unit for the measurement of favorable feeling, the Kanade love power. Then, Kanade's date becomes a double date!
Meliodas and Ban intercept a caravan transporting prisoners to the Ten Commandments, but demons still threaten villages in other parts of Britannia.Watch Now:iTunes
Elizabeth and Meliodas face the Demon King, who now possesses the body of Zeldris. Meanwhile, the Sins clash with a beast summoned by the Demon King.Watch Now:Amazon
Kido is revealed to be Shota's teammate and kills Ryuji with a single punch without transforming into his hybrid form. Kido shocks the investors by mercilessly beating Ryuji’s corpse. Ichinosuke is attacked by Shota, only to suddenly disappear. Kaede is ordered to flee from the area. Eruza and Hitomi happily begin fighting each other. Ichinosuke is shown to have fallen into one of the tunnels dug by Ui who surfaces next to Shota causing her to flee in panic. Eruza pins Hitomi, intending to kill her but instead they begin kissing passionately. They are shown to be drugged by Kaori Rikujo, a Civet Hybrid from Yatsubishi who can produce a pheromone that causes uncontrollable lust. This enrages Yoko who considers such tactics shameful and without honor. Kaede is maneuvered into fighting Taiga but is killed instantly. The investors get more excited watching Eruza and Hitomi until Yoko angrily demands the game continue. Her true intention is revealed, to humiliate Shidoh by beating his hybrids and tactics and ending his influence over her beloved grandfather. Hitomi suddenly breaks free from her lust by focusing on her real lust for Shidoh. She attacks Kaori just as Taiga reaches them.Watch Now:Amazon
Souta is freaked out by his encounter with a shape-shifting tanuki, but how could anyone leave such a lonely-seeming little thing to fend for itself? He offers the hungry crybaby some shoyumame to eat, and a bath to boot. After that, Souta decides to take the kid into town via the Kotoden train line for some much-needed clothes shopping. There he runs into his first love, Manabe-san, now the mother of two young children, and coincidentally enough, she has her own little ones in tow, too. Caught off guard, Souta introduces the tiny tanuki by the first name that pops into his head: “Poco.”Watch Now:Amazon
Kosuke enjoyed his date with his beloved Aika. They did things like shop for clothes and watch a movie. In the midst of his fun, Kosuke watched Kanade, her date, and a lot of other couples up close. He ends up being made aware he was the only one playing with dolls, and the feeling makes him scream and cry. Meanwhile, Kanade is still in shock from the words Shikijou said to her on their date: "You didn't seem normal." Seeing this, Yukimura asks Kanade for the definition of "normal," and declares that living with an obsession about being "normal" is a truly stupid way to live.
The long-fought Holy War comes to a dramatic end. Peace returns to the Kingdom of Britannia once again, but a new threat looms on the horizon.
With Escanor's aid, Meliodas and Gowther reach the spirit world, where they aim to split the Demon King and Zeldris back into their own bodies.
Merlin rescues Elizabeth, who barely evades a falling boulder on her way to the Demon Realm with Meliodas. The Sins realise the Demon King is alive.
Despite harsh words from Akane, Yuzu will go to great lengths for her beloved older sister. Yuzu refuses to relinquish her forbidden love even for someone like Seiji, who she may care about more than she realizes. Meanwhile, on the hunt for a new couple to match, fortune smiles upon Seiji and Guri when a classmate approaches them saying she has a crush she would like paired with.Watch Now:Amazon
At the Mutsumi Festival, Kosuke and the others debate the relationship between wearing wedding dresses and the age at which a person gets married. Yamamoto, with her thirties closing in on her and also due to pressure from her parents, relentlessly proposes marriage to Kosuke. After outrunning Yamamoto, Kosuke turns to look back and finds Ibarada standing there wearing a wedding dress. When a child asks, "Aren't you getting married?" Ibarada and Kosuke reply by... Meanwhile, Kanade, who had been looking around the Mutsumi Festival with Shikijou, coldly turns away from Yukimura and tells Shikijou that she doesn't know him.
Struggling to find Seiji, Akane and Yuzu are worried when Guri tells them that he is off with Shikimi searching for her crush. The concern is warranted when Seiji finds himself in the midst of a torture session! Her ultimate goal isn't just Seiji, but Akane and Yuzu. What is her link to the two sisters and what is it that she's after?Watch Now:Amazon
After Kanade rejects his confession of love, Shikijou presses her for a reason, grabbing her arm and saying, "This isn't normal. This isn't like you." Kanade throws him by reflex, then Shikijou flies into a rage and turns a stun gun on her! When Kanade slowly regains consciousness, she finds herself in a dimly lit abandoned warehouse where a group of delinquents are chatting and laughing. Kanade's hands and feet are tied with rope, so she can't move. Shikijou moves closer to her saying, "Kanade-san, you aren't normal right now. We have to reform you."
Guri has been missing for over a week and Korari is concerned Seiji is not taking it seriously. Seiji suspects Shikimi is responsible and confronts her. Shikimi captures Seiji and kisses him with Guri secretly watching. Guri had confided in Shikimi her fear something was missing between her and Seiji. Shikimi suggests staying away from Seiji and observing him with with Akane. Guri saw that Seiji did not seem to be looking for her. Akane and Yuzu arrive and Shikimi reveals the depressed Guri. Shikimi tells her to ask Seiji how he feels about her. Seiji angrily responds that Guri has only ever been a nuisance, causing Guri to become cocooned in black feathers. Maou appears, having been working with Shikimi to manipulate Seiji into breaking Guri’s heart so she would fall from heaven and be reborn as a demon. The new demon Guri nonchalantly announces that the old Guri is dead and it is Seiji’s fault, then leaves to begin breaking up all the couples she ever brought together. Shikimi leaves with Maou. Yuzu blames Seiji for neglecting Guri and insists he help her save Guri. Akane refuses to help while Seiji decides he also wants to save Guri.Watch Now:Amazon