maina goes to an esthetic salon introduced by a friend, hoping to enlarge her small breasts. after a light treatment and drinking herbal tea, she loses consciousness. when she wakes up, she finds herself restrained and a mysterious liquid is applied to her nipples, giving her an unfamiliar pleasure. she is forced to have her nipples played with and fucked, reaching orgasm repeatedly. maina is held captive in the esthetic salon, and every day, more men come to ejaculate on her nipples, creating a hellish daily routine.