Eriko, a strict educator, hates anything lewd. She sends her son off to school, warning him not to play with strange kids. One day, she sneaks away with a porn magazine she found lying around the front door and masturbates. But it was all a trap set up by the naughty kid! The kid threatens Eriko for masturbating and makes a lewd request. It's been a while since she's had sex with her husband, but her lewd nature is awakened by a little boy's penis, and she becomes addicted to secret play...