Haruka Shinozaki est un lycéen ordinaire qui décide d'avouer ses sentiments à la belle et intelligente Akiho Kōsaka. Avec surprise, elle accepte de sortir avec lui. Tout comme pour ses études, Kōsaka prend sa relation avec Shonozaki très au sérieux. Néanmoins, elle adopte un comportement assez étrange en parlant régulièrement de sexe. Nos deux jeunes amoureux réussiront-ils à avoir une vie de couple normale ?

It's little sister vs. girlfriend as Kosaka and Kanata "fight" for Shinozaki's attention. Later, Kosaka begs Ariyama for cooking lessons and gets more than she bargained for.

When Shinozaki visits Kosaka's house, he discovers that Kosaka's attractive mother is just as odd as her daughter. Later, Kosaka furiously studies for their first date.

A new student arrives, and this sheltered girl partners with Kosaka to study men. When Shinozaki fails to "satisfy" her, the new girl, Rina, explores other options.

The girls are giving Shinozaki a hard time until they misunderstand a certain question. What hilarious answers will the girls give Shinozaki?

Kosaka has made a new friend, Seiya. Unfortunately for Shinozaki this opens up a lot of new feelings and he can’t quite keep his jealousy in check.

Shinozaki and Akiho find a lost dog and are instantly taken with it. Meanwhile, a school camping trip is announced and hilarity ensues.

Igarashi catches Shinozaki in a questionable situation, and to make matters worse she ends up in an embarrassing one! Later on Akiho has her own dilemma to deal with.

Shinozaki is unable to go on a date with Akiho because of some family issues. Shizuku on the other hand, is more than happy to step in!

As everyone begins to prepare for exams, Shinozaki reflects on his relationship with Akiho. Will the two be able to convey their honest feelings to one another?