One day, Kae's favorite anime character dies, and she suddenly loses a lot of weight in shock. She becomes a head turning beauty, and because of that, gets asked out on a date by four hot guys from her school.
Mutsumi finds a hidden treasure map in the History Club room and invites everyone to go treasure hunting. Everyone is less than thrilled about the idea, but after finding out Kae would be going alone with Mutsumi, they decide to go too.
The anime Mirage Saga is hosting a Valentine's event, and Kae decides to make chocolate for the event. As Kae fusses over what chocolate to make in order to perfectly capture Shion's beauty, Nishina suggests Kae try making a 3-D chocolate sculpture.
The group goes to Nishina's holiday house by the ocean to swim. Everyone has fun bodyboarding, eating at a beach hut, and playing beach volleyball. But while doing so, Shinomiya realizes just how unreliable he is and loses confidence in himself.
Mutsumi tells his brother Kazuma, "Serinuma-san is my girlfriend." However, Kazuma keeps on pursuing Kae, now with even more gusto. Igarashi, Nanashima, Shinomiya and Nishina all try to band together to get in Kazuma's way.
After losing weight, Kae does extremely well in PE class. Seeing that, some girls from the soccer club ask Kae to help in a practice match. Kae has full confidence in her knowledge, but she actually only knows soccer from anime and has never played.
With Christmas around the corner, Nanashima suggests everyone have a party. However, Kae says she can't possibly make it because she's going to Comiket. In the end, everyone decides to go to Comiket together, then have a Christmas party afterwards.
For the school cultural festival, Kae's class decides to host a cosplay café. Kae is fired up about designing the costumes not only for her classmates Igarashi and Nanashima, but also for Shinomiya, who's playing the role of a princess for his class.
Everyone goes together on a one night trip to attend the death anniversary of Hyakki Sametora, the samurai the lord in Kachu Rabu is modelled after. Both Kae and Nishina are enraptured by the real armor and helmet Akane is modelled after.
A new anime, Katchu Ranbu, or Kachu Rabu for short, has started, and it's hugely popular. Both Kae and Nishina are elated about the show, until they find out that they each ship Lord x Akane and Akane x Lord respectively and get into a huge fight.