Reimi Hasegawa, a 2024 AV debut actress (estimated F to G cup busty beauty), takes on her first ever masochistic role! At the director's request, "Just act like the nymphomaniac you imagine for this adult video!", the usually ultra-gentle and soothing older sister transforms into a sadistic dominatrix! First, she gives M-kun a gentle kiss and licks his nipples, then performs a blowjob and a face fuck on his fully erect cock! Unable to hold back, she swallows every drop of his intense cumshot! After taming the M-kun with her maternal instincts, the real fun begins! She switches gears, entering queen mode, kicking his cock, riding his face, and teasing him relentlessly. Then, under the condition of "punishment if you ejaculate without permission," she starts the pounding riding position! Unable to hold back, she slaps M-kun several times after he ejaculates. Completely frightened, M-kun runs to the toilet cubicle, where she mercilessly waters him down! The director, surprised by her unexpected sadistic nymphomania, temporarily stops the shoot. After resuming, she returns to her usual gentle older sister persona and rewards M-kun with a creampie sex and a face full of cum! [Director's recommendation: "Her unique nymphomaniac play, showcasing the contrast between her gentle and kind personality, is highly recommended! We eagerly await your offers!"]