Hikaru has been pining for the girl next door, Mioto. But she's going out with his friend Hakuro. Hikaru has also been sleeping with Akimi, and she walks in on him spying one day. Akimi's always had a thing for Mioto's boyfriend, and she wants his help to arrange for a little partner swap. But soon he'll find that the whole thing was a plan between Akimi and Hakuro to get Mioto and Hikaru involved in a four-way orgy.