Busty college student Koiro Yuki works at a convenience store and falls for her kind manager, Makoto. He rejects her confession because he is married, but she refuses to give up, tempts him with her tits, and finally gets him into bed. After he insists they cannot do it raw, they borrow a few condoms from the store—only to lose control and use every last one. Even that cannot stop them, and their secret affair descends into raw creampie sex.