START-345 A part-time housewife working at a hidden top-class erotic body gyudon chain store is having unprotected, messy affair sex with a student part-timer, Sumaki Hibiki

Hibiki, a married woman working part-time at a gyudon chain restaurant, becomes close with her college student coworker. She is drawn to the earnest and sincere young man, and one day, after finishing work at the same time, they go out drinking and end up having sex in a hotel on impulse. After that, they have sex wherever they can—after work, during breaks inside the store, even in the kitchen while the store is open—and realize their bodies are perfectly compatible…