Nagachichi Nagai-san The Animation

Yumi Nagai, an overweight woman, begins personal training at a gym with a trainer. During their first session, another man joins them to do planks nearby. As Yumi exercises, her large breasts bounce noticeably, causing the stranger to become aroused and stare. The trainer notices she’s become wet and uses this as an excuse to conduct an “examination” of her body. Under the guise of training, the two men sexually assault her, starting with intimate inspections and progressing to oral sex and penetration. Despite her initial resistance, Yumi becomes increasingly aroused and compliant.