Toraware no Palm: Refrain

Five years before the events of the original game, you find a book lying in the road one night and follow where it leads — to a young man named Chiaki, collapsed in an alleyway. You help him. That act turns your life upside down. To visit him, you travel to a detention center on a solitary island, where you discover an unjust suspicion hanging over him. He may hold the key to a certain incident. To clear his name, you agree to help restore his memories as his counselor — and in doing so, must confront the truth of his past and your own feelings.