I'm a college student living in a run-down apartment with no future in sight. One day, while I was just going to university without any hopes or dreams, Rio moved into the room next door. I was drawn to this woman with a bell-ringing laugh and a childish appearance, but with a somewhat mysterious aura... She takes advantage of something and invites me to do something. Unable to resist the sweet whisper that soothes my eardrums, I do as he says, and before I know it, I'm drowning in sex with a married woman.