Hinagiku's birthday is coming up, and her mother asked her if she would be spending it with someone she liked, which makes her become anxious around Hayate the following morning. Both Hayate and Hinagiku find unsigned love letters addressed to them at school, and they both think that each other might have sent the letter. They later meet the the appointed place in front of the kendo dojo, but find out that it was Kōtarō Ayumamiya who sent the letters in order to show Hinagiku that he could defeat Hayate. Hinagiku then leaves, mad at Hayate for saying that she wouldn't do anything girly and lying that he didn't expect the person who wrote the letter to be Hinagiku. He challenges him to a game of cat's cradle, though loses terribly.
Hayate wakes up Nagi one morning to find a large white tiger sleeping with her in her bed. The tiger, named Tama, nabs Hayate and carries him outside to fight. Hayate inevitably loses. Afterwards, Klaus, who is still upset about Hayate being Nagi's butler, challenges Hayate to a match with a robot to see if he has the necessary skills to be a butler.
Nagi, perplexed by Hayate's apparent lack of weaknesses despite being a main character, plots ways to find chinks in his armor. As her various schemes fail to produce results, Maria, Sakuya, and Isumi get swept up in the flow and discuss their weaknesses as well. Hayate and Wataru begin studying German in preparation for a Hakuō mathematics exam, while Maria tells Hayate a bit of background information on Isumi, Sakuya, and Wataru. When they go to check on Nagi and Wataru, Nagi becomes jealous that they are alone together, prompting Maria to remark that Hayate's weakness seems to be not understanding the female heart.
Klaus is feeling depressed after Nagi gives him permission to retire after he tells her about a dream he had, where he retired on a coffee plantation in Brazil. After Maria tries to convince Klaus to stay, Klaus decides to challenge Hayate to see who is the better butler. Klaus fails at this and has his mind set on retiring. Maria comes up with a plan that involves Hayate's female alter ego, Hermione. This plan fails as well and just before Klaus is about to leave, Nagi thinks of a way to make Klaus stay. Her plan succeeds and Klaus decides to stay as a Sanzen'in butler.
With the realization that Anko is Dark Grasper, the Twin Tails find a hidden message in her lyrics. They decide to go to her concert to stop her from potentially holding thousands of fans hostage, but Dark Grasper has other plans in store.Watch Now:Amazon
In his hideout, Art kills himself so that his Minimum would generate his body alongside his life. Meanwhile, Honey is told by her comrades how she lost her senses in the previous night when using her Minimum. Not believing it, she uses her powers, causing her to act like a child again as an apparent sideeffect. Honey later receives a bodyguard request from her father, Doktor, a consultant to the Minimum Agency's medical department who has been pursuing stray Holders. Doktor later cancels the job and an angered Honey remembers how her father aimed to use her powers for assassination jobs. Concerned with Doktor's plans regarding Holders, the people from Freemium kidnap him alongside his daughter. Three receives an alert from his partner and goes to find her with Nice, Murasaki and Hajime. Eventually, Honey uses her Minimum to send Three her future location at the cost of regressing again. Three activates his own powers and saves both Honey and Doktor before their car is destroyed. Meanwhile, BIrthday and Ratio finish his respective jobs but both experiences sideeffects regarding his Minimum (Birthday start licking batteries and Ratio is weakened). Finally, Nice, Murasaki and Hajime are given the culprit's location but they are intercepted by Art.
Since Akari has been talking about Aria all the time after she became Aria’s (yet to be official) Amica, Shino increasingly becomes worried that Akari may not stay a close friend with her. In order to resolve the situation, she invites Akari to her home.Watch Now:Amazon