Seduced by the insatiable, enormous buttocks of an unparalleled auntie, I was repeatedly subjected to illicit ejaculation and buttock groping... (ROYD-333)

To attend the university's open day, I'm temporarily staying at an older woman's house in Tokyo! Since her husband is away on a business trip, I'm alone with her! And seeing my thin frame, she forces me to participate in her daily training! It's been so long since I last saw her as a child; she seems to have maintained her physique through rigorous self-training, remaining beautiful even with age, and most importantly, exuding undeniable sex appeal! Seeing her alluring breasts and bouncy, large buttocks, I instantly become erect! Then, with lewd whispers and touches on my penis, she swayed her shapely buttocks, happily sucking my semen dry like a pile driver in a riding position! Faced with her amazing waist-thrusting skills, I ejaculated again and again! A stunningly beautiful, carnivorous instructor × a thin, gloomy me!