My older sister and I are too close to take a bath and sleep together even after we grow up. A childhood friend who knows it recently began to be jealous of her older sister! I'm sandwiched between my childhood friend who tries to separate me and my sister and my sister who is spoiled by me, and I don't know what to do! Then, my childhood friend seduced me, and her older sister started using her charm as well... To 3P like competing for me!
