M-kun's beautiful, older sister, Ayumi, takes advantage of their time together, giving him an unforgettable lesson in pleasure. She slowly strips him, worshipping his growing erection with her soft lips and eager tongue. Ayumi masterfully teases him, building his anticipation before finally swallowing his length, driving him to the brink of ecstasy. Unable to hold back, M-kun erupts, filling Ayumi's mouth with his hot, sticky seed. She swallows every drop, leaving M-kun breathless and satisfied.