Summer holiday! Masahiro is a university student and lives at an apartment. One day, he meets a beautiful girl, Sakura, at a coin laundry. She actually lives next to his room. He is happy to hear that, but he is forced to move because the apartment needs to be repaired. He sadly says good-bye to Sakura and moves to a new apartment where a sports club is located nearby. He soon starts working part-time there, but his part-time life is surrounded by sexy and erotic girls. Sakura is also a member of the club. Like this, his exciting and sweet summer holiday starts....