Yoshihiro, the four-eyed honor student with dreams of becoming a doctor, and Shunji, the ace of the gymnastics team, have been friends since childhood. In high school, they meet Kakeru, an airhead with a soothing presence, and both fall in love. The two promise each other (without consulting Kakeru) that if they were to sleep with him, they would do it together. However, they're unable to contain their desires and go head-to-head putting the moves on Kakeru! And Kakeru, who rejects their advances at first, feels flustered by their passion...... When will the three young "bananas" get peeled into adulthood......!?