Nono and Momoka, close friends, spend the night at Nono's place. As they settle in, they hear Momoka's neighbor engaged in passionate lovemaking through the thin walls. The sounds stir their desires, causing them to exchange heated glances. Unable to resist, they begin to touch themselves, their soft moans mingling with their neighbor's. Nono, her breath hitching, initiates a kiss with Momoka, their tongues dancing as they explore each other's bodies.