ADN-505 I've been dating my girlfriend's older sister for six months. Every time we meet, we end up having sex. (Hasegawa Yuna - Hasegawa Yuna)

Looking back now, I think I was probably curious about her from the first time I was introduced to her (Akane). When I learned it was my older sister's (Mayu's) birthday, I couldn't stand still, and before I knew it, I was in front of her house. When I rang the doorbell and there was no response, I was about to go home when my sister came out. Ah, I really like her. My feelings became certain.