The dignified and beautiful big sister, reportedly with mixed martial arts experience, starts by teaching non-violent staff striking and joint techniques. In the friendly coaching, her strong core and elegant stance stand out. Then, roles reverse as male staff attack her well-trained, plump body with two large members thrusting fiercely. The once-dignified sister transforms into a masochist, incorporating the taught techniques into sex and climaxing intensely. After the rough action, a super-lewd massage session leaves her body limp, teased thoroughly before a large member penetrates deeply, causing her to half-cry and lose rationality from pleasure. The earnest sex with vacant eyes, sweaty body, and tongue-out lewdness got me fired up watching. The blend of mixed martial arts moves and the shift to masochism is masterfully intertwined, making me appreciate this as a work with consistently high-level performance throughout.