She loves bananas! The aho-girl, Hanabatake Yoshiko, who doesn’t care if she can’t do her studies at all, starts yet another day at school. Her carefree actions of idiocy seems to not only cause trouble for her childhood friend, A-kun, but her classmate, Sumino Sayaka, as well.

Sayaka visits the Hanabatake house! But awaiting her there was none other than Yoshiko's mother, Yoshie. Fearing that Akuru might be stolen away by Sayaka, she does what she can to embarrass Sayaka. Yoshiko joins the mix, and what does Sayaka do?

Yoshiko wins a vacation in the shopping district raffle and invites Akuru and Sayaka to go with her, but the disciplinary committee president and Ryuuichi catch wind of the trip and ask to go. The topic naturally changes to buying new swimsuits, but then Akuru refuses to go. And a surprising someone swoops in to convince him otherwise!

Yoshiko and friends arrive in Izu Atagawa, change into their swimsuits, and head straight for the waves. The disciplinary committee president tries to flaunt her precious rack, but fails and is buried in the sand as punishment by Yoshiko. Yoshiko goes on rampage and buries Sayaka as well, and starts sculpting some ------- and a ***** on them too!

Yoshiko goes out for a walk with her dog. But their walk is no simple walk. Yoshiko rides on her dog's back, and eventually they reach the mountains. A race breaks out between Yoshiko and her dog traveling at unprecedented speed and the legendary rider of the peak. Who will be the victor?

Ten years ago, Yoshiko met Akuru. Childhood friends, the kid next door, the old cliché story, shattered into a million pieces with the tragedy which unfolds. Young Akuru seeks the power to defeat Yoshiko, surpassing his limits out of fear. What is born in the young Akuru's heart?