On a double date trip with a best friend couple, I started having a good time with my best friend's sadist boyfriend...we secretly had sex and my sadistic side blossomed. Yuna Hina
Couples Yuna and Masashi and Ai and Teruda, who attend the same university and belong to the same club, often go on couple dates and are all good friends. The four of us went on a trip because our anniversaries were coming up. Even though they knew it was no good, Yuna and Terutahi went on a one-night, two-day trip where they had sex without telling each other's boyfriends and girlfriends. "I love my boyfriend, but my sex compatibility with my best friend was the best..."
