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 her bell-ringing laugh, childish appearance, and somehow mysterious aura. She takes advantage of something and invites me to do something. Unable to resist her sweet whispers that touch my eardrums, I do as she says, and before I know it, I'm drowning in sex with a married woman.