Kazuma Hoshino moves to the beautiful countryside to take care of his little brother, Ayumu Hoshino. They ended up staying in a Japanese Inn that their father knows but not being accustomed to the streets of the countryside, they get lost on their way to the Japanese Inn. Moreover, Kazuma gets into a bit of mischief in the mountains...Being in an unfamiliar place, a woman appears before him.

Ui and Hajime are sharing a slice of cheesecake, Hajime reaches to wipe cream off of Ui's cheek. As he does it a flashback of the kiss by stream causes Ui to wake up in surprise.

Kazuma has to keep fighting a misunderstanding. And he feels like someone's watching him from the shadows...

One day, Kazuma runs into a tall beauty, however...

Yamabiko South High's athletic festival kicks off! Can Kazuma shine?!

Since the final exams are looming, everybody gathers at the Yorozuyo for a study party.Everybody is studying seriously.Daigo's imagination runs amok in the bath.Then Daigo's way is blocked by Senka...While everybody's thoughts getting entangled, Ui sinks into her solitary thoughts...