[Hitotose Rin] Kininaru Machine (Intriguing Machine) [Full Color]

A mischievous classmate lends out a peculiar device, and a curious blonde with twin tails—whose clumsy attempts at self-pleasure leave her flushed and desperate—soon finds herself seeking help from the very same girl who offered it. As tension simmers between the teasing donor and the overwhelmed recipient, the story teeters on the edge of a shared experiment that promises far more intimacy than either bargained for.