"I want to change things up..." Keiko (Momoko Issei) was confused when her husband gave her some obscene underwear. While her husband was away on a business trip, she secretly stared at herself in front of the mirror wearing the obscene underwear, and for the first time in a long time she remembered herself as a woman, not a wife. However, a man from the next door house saw her in her obscene underwear from the balcony. Keiko was tormented by the shame of being seen and the sense of guilt of being conscious of a man other than her husband, and her crotch began to throb unconsciously...