Kotono, Takeshi, and Ayumu are always good friends. Kotono and Takeshi are dating, but Kotono is very kind to Ayumu, so Ayumu, who is not very good with women, mistakenly thinks that she is being nice to him because she likes him. Even though she is his best friend's girlfriend, she ambushes Kotono and goes into his room, forcing herself on him, saying, "If you like me, isn't it okay?"