Should I practice sex behind my sister's back? Losing to a busty older sister who's heartbroken after being dumped by her boyfriend, I easily lose my virginity and then become addicted to secret affairs and strange encounters. (Amakawa Sora MIAA-792)

He secretly had sex with his girlfriend's older sister, hiding it from his girlfriend. He lost his virginity to temptation and ejaculated inside her. While his girlfriend was away… he had sex with an adult's breasts and gave her oral sex. He had his first time using toys for playful sex. He couldn't be satisfied without his sister, forgetting his girlfriend and having sex inside her. He was gently kissed and penetrated… his heart raced because it was all his first time. The more he knew it was wrong, the more he indulged in the adult's allure…