[HBAD-664] I was noticed by a black gal sister who is famous for being a, and I spend my days as my sister's sexual desire processing Ji ○ Port Ranka

Ayumu is a student who is full of erotic things but is not a shadowy and unmotivated student. One day, I saw that Ranka, a black gal who lives in the same apartment and is rumored to be a, was blowing a man while masturbating on the stairs of the apartment, and I involuntarily took a voyeur with my smartphone, but it seems that the voyeur was caught, and later I was ambushed on the stairs and taken to Ranka's room ...