Just when Akihisa and Yuuji start to feel like the girls may have forgiven them, they discover the worst is yet to come. The summer festival has some peculiar punishment in store for all the guys!

When Hideyoshi’s tone-deaf twin is asked to sing the school song, he’s roped into a costume change that’s just asking for trouble. Then, Akihisa gets a new admirer—or two?—when he risks his neck to help Haduki cheer up her big sis.

Complications arise after Mizuki and Shouko interrupt Akihisa’s card game. Later, during a test of the Avatar system, the summoners of Class F are embarrassed to find their innermost thoughts revealed.

After Akihisa seeks Kouta’s advice on how to deal with a troubling blackmail note, he learns that Yuuji is in a similar situation. Kouta’s investigation uncovers clues that suggest one person is causing all of the problems.

The search for the blackmailer continues, with Akihisa, Yuuji and the others narrowing in on a suspect: Aiko Kudou. In order to confirm their hunch, the gang once again sets out to sneak a peek during bath time.

The guys rally every male at camp to assist in their mission of peeping on the girls. After combining their abilities, they finally make it to the girls’ restroom - only to see something none of them expected!

Flashback: When Minami arrived in Japan, she didn’t know much of the language and had a tough time connecting with others. Her first encounter with Akihisa was awkward - but they soon became friends.

Thanks to Minami kissing Akihisa in front of Mizuki, there’s drama in the air and rumors of an impending war between Classes F, D, and B! Luckily, Class F has a plan that may give them the advantage!

After being confronted by Akihisa, Miharu declares war! Even though he’s willing to do battle alone, Akihisa is dealt a beat-down by a group of guys sent by Yuuji, forcing Miharu to reconsider her plan.

Flashback: In fifth grade, Yuuji’s attitude makes him a target to the older kids in school. When Shouko tries to save Yuuji from a group of bullies, it doesn’t take long before Yuuji is forced to rescue her!

When Class F is challenged by some older students, the battle takes place in a haunted house. To win, Class F must get through without screaming. Unfortunately, the older kids have some scary tricks up their sleeves.

The haunted house battle continues! With the ranks of the younger students thinning, Akihisa and Yuuji trick Tsunemura and Natsukawa into entering a different battlefield. Will their plan lead to victory?