A new 22-years-old older sister's porn debut ~Nee-Chan. Just how much do you love sex v1.1 by Atelier Sakura Eng - Adult Sex Game

Shinonome Miki is a brilliant student attending a prestigious private university.
Even from her younger brother’s perspective—mine—she’s beautiful, a little airheaded, but her personality isn’t bad either.
Honestly, she’s the kind of older sister you’d be proud to show off anywhere.
We often go shopping or hang out together, and we’re so close that people sometimes mistake me for her ***friend.
Then one day, she dropped this bombshell: