During her husband's business trip, married woman Hibiki Otsuki lives under one roof with her younger brothers-in-law. The sexually frustrated sister-in-law puts sexy lingerie on her drunk, sleeping brothers-in-law, wraps her arms around them from behind, and teases their nipples. She brings their erect cocks to the edge without letting them cum, tormenting them with aggressive handjob sessions, then handcuffs them and playfully tortures them with teasing denial. Later, she rides them with hip-swaying cowgirl positions, taking creampie loads inside her. The older sister reaches climax through cunnilingus, fingering, and the pleasure of incest, achieving a total of 17 orgasms.