Koukaku Kyoushitsu ~Classmate wa Shiriana ni Mezamete Shimaimashita

It's break time. I’m sitting alone in a corner of my class, scrolling on my phone.
I’m not exactly being bullied, but I’m like air—barely noticed.
My only joy is browsing the school SNS.
There, I saw a strangely provocative title and couldn’t help but blush.
“Anal masturbation feels so damn good,” it said… And so began a new chapter of my life.

[Translated from dlsite]