学怨天獄

Main character is being bullied by one girl every day. The scale eventually escalates to such level that he gets sexually harassed in front of the girl of his longing. He goes to the roof to commit suicide, but he is deprived even of that dignity as he is pushed by another girl coming by. He awakens as a spirit to have his revenge over bully and the girl to push him down. [From vndbreview]