Rina, a gyaru girl, has a very peculiar relationship with Zen, her childhood friend. She forces him to dress as a bear, just like they did when they were kids. However, their game recently took a more intimate turn, as Rina began performing oral sex on him while he was in costume.

Everything changes when Zen decides to put an end to their arrangement and tells her he no longer wants to continue with that kind of relationship. Desperate, Rina confesses her true feelings of love for him. This moment marks the beginning of a passionate life together, filled with love and sex.