25-year-old Ibuki Watano is into wearing naughty lingerie in public to fulfill her perverted desires.
...However, it still just isn't enough for her! Despite being interested in what some would consider filthy, she's had no way to carry out these fantasies because she's never had a boyfriend to try them with.
However, one day, a regular at the cafe she works at sees right through her as if he's reading her mind!
He suddenly asks Ibuki to sign a contract with him so they can help fulfill each other's kinky desires.
Ibuki agrees, but will they be able to satisfy each other's long-held secret fantasies?