Leo A Journey Through Worlds

This is the story of a self-insert who, after struggling with sickness, dies and reincarnates into the My Hero Academia universe. After a few years of growing up, he gains his quirk, but this also makes him immortal and stuck as a child. Follow the story of Leo as he travels through multiple worlds. Disclaimer: MC is stuck looking like a child and has a slightly regressed mind and emotional control, which will lessen as the story progresses.