Kare no Tame ni Dekiru Koto

To protect him from bullies, a girl offers her own body...

One day she was walking along when she came across her own boyfriend.
He was being persecuted by a gang of boys. "You want to step up?" they said.
"If you take his place, we'll stop."

She obliged and submitted to their verbal abuses... but it didn't stop there.

[From DLsite English]