After settling into the Sazanami Dormitory, Kozue grows closer to the siblings Haruka and Yui, their connection deepening with each shared moment. An unexpected, heated encounter ignites a passionate affair, drawing them into a whirlwind of sensual exploration and tender longing. Amidst tangled desires, they discover a profound intimacy, navigating love’s exhilarating and complex currents together, bound by whispered confessions and ecstatic surrender.