Roshutsu no Kaikan

Mika Adachi was an average 2nd year student who did well in school. One day when a molester assaulted her, she was horrified to be ignored by the other passengers. She cried for helpbut everyone just stared while trying not to stare. Nobody helped.
Nobody helped. It was humiliating and thrilling at the same time. When it was done the atmosphere was muggy with sexual arousal, and Mika herself was sopping with juice. She loved it.
She loved it.

[From DLsite English]