MRXD-008 — "My Girlfriend's Sister Is A Nuisance Masochist." Arai Azusa

My name is Makoto. I've been dating my current girlfriend for about three months now. Her older sister, Azusa, is a smart woman who looks good in glasses and apparently works as a researcher at a pharmaceutical company in Tokyo. The other day, I was spending time at my girlfriend's house and I ended up alone with Azusa. At that time, she suddenly said to me, "Hey Makoto, don't call me big sister. I want you to call me 'slut'..."