The New Shirou
The New Shirou,
A guy with a complicated past saves a little girl while giving up his own life. She was more important than he could have ever imagined. He is then given a second chance in his favorite anime world.
Just going to post a warning here. My MC is going to be way to OP and not have any trouble. He is also going to have a harem. If you do not like either of those do not read.