HMN-799 Muscle Trainer NTR: A story about a submissive girlfriend who is transformed into a muscular body that meets the macho man's tastes and becomes a female who cums over and over again with a hard-pounding, carnivorous dick. Yuki Takeuchi

She wanted to lose weight before getting married, so she started going to the gym. There, the trainer in charge showed her his beautiful muscles, and she became involved with his masculinity, which her boyfriend lacked. She went to the gym every day to meet the trainer, and each time, her abs became more and more defined...! She was drawn to the man, who had a charm that I didn't have, and she fell for his forceful muscle fucking, resulting in a depressing erection and NTR!