Natsumi and Misaki, two sisters bound by blood and forbidden desire, explore their deepening intimacy within their high school’s hidden corners. Fueled by budding love and undeniable passion, they surrender to lustful nights, experiencing tender yet fervent exchanges that blur the lines between familial duty and erotic connection. Their secret encounters leave them breathless and irrevocably entwined, discovering a world where sisterly affection matures into something profoundly carnal and consuming.