Miki is a virginal erotic novelist, while Riko is a lingerie enthusiast who has never been kissed. The pair head to a unique love hotel in the name of research...yeah, research, sure! Inspired by the colorful cast of guests she meets in the lobby, Riko suggests some fake BDSM roleplay, but just what punishment awaits Miki when he considers refusing? Then, Miki’s older sister suddenly appears, leading to twice as much trouble!