Kawaii Imouto o Me no Mae de Netorareta Ore

She always walked to and from school with her brother. But every dreamlike moment is shattered by the hands of a sinister abuser!

The brother commits an act of violence to protect his sister, and a male teacher appears. When the teacher is alone with her, he says one thing: "It's true that your brother used violence. If you don't want this to become public knowledge, then do as I say!" She is forced by the man she thought was helping her, and he took her virginity.

Heartbroken, to protect her beloved brother, she became a sex slave. But she didn't know yet that there was more than one man to abuse her. And that deep inside her lay a lustful nature...

[From Official website]