アルフェイム

One day a high school academy student runs out of the class and commits suicide - as it was reported - because of sexual misconduct. His best friend Ikeuchi Ryo did not believe the story - because his friend had number 21 on his palm - and went to his friend's house for investigation. There he found a letter saying the boy would die the next day. The next day when the new transfer student arrived to the class Ikeuchi Ryo fell unconscious upon meeting him. After awakening in the infirmary he realized he gained superpowers and using them showed that the new transfer student and the home teacher and related to his friend's death ...

[From vndbreview]