Anri, raised in a strict household, shared a secret and intimate relationship with her classmate Yaya—one they could never reveal to anyone else. No matter the time or place, the two were always tangled in passionate, steamy affection. Today, they sneak into Yaya's father's car, touching each other's bodies and pouring out their desire. Not satisfied there, they continue their lovemaking in Yaya's room, exchanging tender caresses and deep, sensual kisses. Their hidden world is suddenly exposed one day when Anri's private tutor, Nanami, catches them kissing on the way home. In that moment, their relationship takes an unexpected turn, opening the door to a new, thrilling dynamic.