On the day that Naoto invites his girlfriend Hono over to his house for the first time, he makes a trivial mistake and the two get into an argument. Naoto's father, who works as a writer at home, hears them arguing and enters Naoto's room. There, his father notices how Ke'ai Hono is and invites her over while Naoto is out, under the pretext of offering her advice. Hono's body starts to heat up due to the effects of the medicine his father put in her tea. Her father drags the reluctant Hono into Naoto's room and pushes her down on the bed...