While her husband is away on a business trip, Hibiki Otsuki, a married woman, lives under the same roof with her two brothers-in-law. Her brothers get drunk and fall asleep, but their frustrated sister-in-law, clad in lewd underwear, approaches them. She hugs them from behind, plays with their nipples, and teases their erect penis with a handjob that brings them to the brink of orgasm. After handcuffing her brother, she teases him with handjob, then rides him and cums inside him! The pent-up climaxes with cunnilingus and fingering, reaching a total of 17 orgasms from the pleasure of incestuous sex!!