Innocent na Tenshi-tachi

Main character had just entered university when he got hit by a car. He recovers in the hospital and only joins the study from Autumn.
School director's daughter gets raped and the whole campus gets into a chaos. Suspicions arise everywhere. Main character gets to assist in the investigation.
What awaits hero at the crossroads of his life?
Please, please open the door of your heart to these heroines.