In the story, the high school "Earth Defense Club" is basically the "do nothing club." Club members En and Atsushi are soaking in the bathtub at a public bath when suddenly a mysterious pink creature, Wombat, appears out of thin air and asks, "I want to save this star... please would you lend me your power?" Then, Yumoto, whose family runs the bath house appears and chases wombat to give him a hug. In school the next day, the remaining two members, Io and Ryū, also meet Wombat. Wombat gives all five of them bracelets and tells them to protect Earth. A dazzling light comes from the bracelets and envelops their bodies...
Binan High's traditional pretty boy contest is drawing near. The members of the Earth Defense Club, not showing much interest in the event, mess around in the club in their free time. But when a rival in the student council tries to oppose Ryuu, the club decides to hold a strategy meeting to propel the Earth Defense Club's "#1 Hustler" to victory. Meanwhile, the ballet club advisor's fruitless struggles to take the #1 pretty boy slot catch the eye of Zundar's team. The day of the contest arrives, and the winner is about to be announced, when suddenly...
Elegant music plays in the background as the Binan High student council convenes. The council members: president Kusatsu Kinshiro, Arima Ibushi, and Gero Akoya wish to purge the world of fools by way of the Total Conquest of Earth's Lifeforms Project.
As usual, Kinugawa and Yufuin are walking to Binan High School together as friends. But after a stop at the convenience store, Yufuin suddenly gets angry at Kinugawa and yells at him. A rift forms between the two, and soon a panic develops over them potentially leaving the Defense Club. Yumoto works blindly to try to get the two to make up, but Naruko and Zaou rebuke him for it. Will Yufuin and Kinugawa ever make up?!
The normally cheerful Yumoto is acting strangely. His classmate, the manager of the baseball club, takes his temperature and reveals that he has a slight fever. The members of the Defense Club take him home to the Kurotama Bath, getting an eyeful of extreme brotherly love as Gora devotedly looks after his sick brother.Watch Now:Amazon
Binan High is preparing for their Culture Festival. Since the class that wins the popularity vote gets a cash prize, the Defense Club will participate as well. They'll be serving Kinugawa's curry and transforming into their Battle Lovers costumes to serve "Cosplay Hero Curry."
The rainy season's here, and the Defense Club is dedicating themselves to various indoor activities. Suddenly, they realize that Mr. Tawarayama -- whom Wombat is controlling under the pretext of preserving his life -- is covered in mold! The club erupts into chaos. Just then, Kinozaki and Tazawa of the Press Society burst in looking for material for a story. Kinozaki chases them around, trying to learn their secret, which stresses out Wombat, Yufuin, Naruko, and Zaou.
Yufuin's inspiration leads the Defense Club decides to go on a training camp to the ocean on . Meanwhile, the three student council members head to a beach resort in a limousine. The beach has bright sun and white sand, but there's something a little off about it. A strange feeling starts hovering around the group's members...
The Caerula Adamas plot a way to destroy the mysterious Battle Lovers. They also want to destroy the Defense Club, so as to cut down on club expenses. Thus, they declare that if the club members' scores on their final exams do not meet the average, the club will be dissolved. The Defense Club reluctantly gets to studying. Meanwhile, the student council also tries to scout the financially savvy Naruko to be their treasurer. When Gero offers him a salary during negotiations, Naruko casually agrees to leave the Defense Club. Soon, a monster appears, and the four remaining Battle Lovers must struggle to defeat it themselves.
Long ago, two boys made wishes on a shooting star. One night in the student council room, Kusatsu thinks back on that day, and renews his oath of world domination. Meanwhile, the Earth Defense Club is holding one of its usual conversations about nothing in Kurotama Bath.
At Binan High School in the city of Binan, Japan, Yufuin En and Kinugawa Atsushi, along with along with Naruko Io and Zaou Ryuu, enjoy leisurely high school lives while hosting meetings of a do-nothing club called the Earth Defense Club.Watch Now:Amazon
As the Earth Defense Club plan to see the Student Council off as they go to study abroad, an hourglass monster appears and destroys their Loveracelets. When the monster appears the next day, Wombat returns and gives the boys new Loveracelets, allowing them to transform into the Battle Lovers once more and defeat the monster with just enough time to see the student council off. Meanwhile, a sinister pair of twins decide to transfer into Binan High School.
Two twins, Haruhiko and Akihiko Beppu, transfers into Binan High School, attracting the attention of overweight, beauty-obssessed student Tsukurou Osou. After charming most of the school, the twins, also known as Galaxy Vepper, transform Osou into a Tofu Monster, which is soon defeated by the Battle Lovers.
With the Student Council studying abroad, the Defense Club is asked to present a reading to children. Tagaru Katari, a member of the Speaking Poets Society, is upset at this development as he thinks that only someone with passion can do this job. Thanks to a suggestion from Yumoto, the group decides to do the story "Jizo and the Hats" for the children. But when Vepper transforms Katari into the Mic Monster, it's up to the Battle Lovers to keep the children safe and save the play.
Fed up with Munakata's practicing in the Volleyball club, Shuzo Oka quits. But as Munakata finds a new club ally in Yumoto, Shuzo becomes jealous and is transformed into the Volleyball Monster. When he finally sees the truth, Shuzo and Munakata vow to not graduate until they finally participate in a Volleyball tournament. Meanwhile, we see a little more of a connection between the Beppu twins and a certain former Battle Lover.
Christmas is a magical time that makes people go a little crazy. On the day of Christmas Eve, Yufuin makes the shockingly uncharacteristic suggestion that that they hold a Christmas party. Gora joins the Christmas party at Kurotama Bath, and even more unexpected visitors show up, throwing the party into chaos! A one-night-only miracle of love and confusion begins!
The Beppu Brothers declare outright to the Defense Club that they're the ones who have been sending the monsters, but the Defense Club members just brush them off, spending their days in their usual slow pace while ignoring the brothers for two whole months. The Beppu Brothers, enraged over this slight, choose February 14th as the day they will have their revenge. And so the Valentine's Day grudge match begins!
The wood chopping-obsessed Gora has gone missing, leaving wood unchopped! Yumoto and his "senpais" search fervently for Gora, but can't find a single clue as to his whereabouts. A dejected Defense Club returns to the bath to relax, where they receive an unexpected visitor...
To the rest of the Defense Club's disappointment, Io and Ryuu got themselves into a little fight. Yumoto, En, and Atsushi excuse themselves to Kurotama while Wombat is left to help Io and Ryuu reconcile, though with no results. The flashbacks show how Io and Ryuu met, showing us they couldn't stand each other at first, and how they decided to join the Defense Club. Kuroshiro Kumano approaches the Beppu twins on how to become an idol, as he would like to become like them.
It's New Year's Eve, and the Defense Club members are gathered at the Kurotama Bath, fighting over the TV and cozying up at the kotatsu with their usual leisurely air. Although they expected to go their separate ways after eating Gora's home-made soba, the area directly around the Kurotama Bath is suddenly hit by a blizzard, which cuts them off from the outside world! How will the club react to this disaster situation?!
The always-energetic Yumoto is sighing, which takes the other Defense Club members aback! It seems an old amusement park he used to go to, Binan Land, is closing. The other Defense Club members aren't too surprised, saying "it was a pretty sad place" and "Every couple that's gone there has broken up," but Yumoto is truly despondent at the thought of losing a place he used to go to with his big brother. The others can't stand to watch him looking so down, so they pool their money to give Yumoto one last trip to Binan Land.
Continuously annoyed by Yumoto's brotherly connection to Gora, Haruhiko and Akihiko try to come up with a new plan to destroy the Battle Lovers. Meanwhile, Bernardo, the older of the Italian twins that also recently transferred to Binan, tries to figure out if his brother really hates him as the two have had a rocky relationship recently. Taking advantage of this development, the Beppu twins transform Bernard's brother Alan into the Chest Hair Monster. Thanks to the Battle Lovers, the monster is defeat and Alan and Bernard finally work out their differences.