"I'm doing this with my brother-in-law when my husband's sleeping right next to me... but it feels so good...!" Yukiko is living a tranquil newlywed life with her husband Masatoshi. But, everything changes when his little brother Satoru comes to stay. That night, Yukiko and Masatoshi decide to make love for the first time in a while, but the fun doesn't last long when her tired husband jumps the gun and finishes early. Unsatisfied, Yukiko turns to self-pleasure next to her peacefully sleeping partner, but she gets so into it that she doesn't even notice the uninvited guest right before her eyes! "My brother can't satisfy you, right?" Satoru skillfully fingers Yukiko's already dripping pussy and brings her to an explosive orgasm. Unable to make a sound, her desperate body is vigorously penetrated by a dick that's even bigger than her husband's...!