Dance Through The Battlefield

This story is about a boy who was blamed by his mentally ill younger brother. His parents believe his brother and put all the blame on him. The boy didn't care much as it happened years ago and they still hated him for some reason but he still loves his family. He found himself being comfortable in dancing but his family was against it, and he didn't care much as he didn't need their permission to dance, but they ruined it all. They said they were sorry but it was too late. They sent his younger brother to a mental hospital but he didn't care as he no longer have the ability to stay bright as before. He just found comfort on reading novels and such, nothing else. He no longer wants to live in that shitty world but he has no ability to kill himself. Then when he was going to take the train, he was pushed by someone off the railings, it no other than his mentally ill brother.

He doesn't regret dying there, but then he was reincarnated as a new born baby and live with someone who is crazy?