[Exclusive Riho Shishido takes on the role of a slutty older sister for the first time!] While staying at her girlfriend's house, he bumps into his older sister Riho, who is a braless girl, and gets an erection by staring at her plump, soft breasts! Riho notices this and approaches him with a grin, showing off her defenseless breasts and floating nipples! He succumbs to the temptation of her big breasts, which she doesn't have, and has an affair! After that, she teases him with a titty fuck, breastfeeding handjob, and nighttime sex, even though his girlfriend is right next to him! There's no way he can resist seeing her braless breasts, which are full of adult sex appeal!