My younger sister, who has always liked me, is insanely jealous because I went on a date with my childhood friend's older sister. She tries to seduce me by not showing her bra and breasts. (Uno Mirei, SONE-364)

I have several sisters, they're childhood friends. My older sister is in the same grade as me, and my younger sister is three years younger. She went out to tell Mirei, but… well… I guess she's in celebration mode? Maybe because she feels like her nervous older sister has been taken away? What if she's invited to your house again to bother you…? Oh dear, my breasts are about to overflow! "Wait, Mirei, what are you wearing?" "Huh? Isn't it? It's okay, this is Mirei's house." Mirei was wearing extremely revealing clothes, she crossed her arms, and pressed her breasts together. It's unbearable to look at… Oh, so Mirei likes me!! That's why he looks so suspicious. Even though my sister was nearby, she still showed off her cleavage and seduced me by pressing her breasts against me, her breasts were very precocious… I stole her eye and got a blowjob… At first, I accepted it. It's dangerous, very dangerous! But I don't hate the thrill. Even though I know I'm betraying her, sex with Mirei is so pleasurable that I can't stop.