HODV-21839 - The fiancée's sister, with J-cup breasts, indicated willingness for intercourse and attempted to seduce him. Sakura Matsuhi.

Despite the fiancée still using condoms, he had unexpected sexual intercourse with her sister. "Absolutely keep it a secret from my sister." He was unable to refuse the temptation of a provocative woman with J-cup breasts while his fiancée slept nearby! The thrill and risk of being discovered were immense, but she allowed him to perform acts she would never normally allow, such as raw insertion and deep penetration, leaving him extremely aroused.