Kiba's manga / #student x teacher(2)

It's a decent story, though can't figure out what was inside Makoto's butt in the 2nd the last page beside a marker and Kaname, cause it looks like there's something on the left inside the butt sandwich.

3 short stories about slave/master relationships in a school. Definitely hardcore, lots of extremes and mostly uncensored. A good hardcore manga, just be prepared for s/m.