I got reincarnated into My Hero Academia with a shadow Quirk

Ethan was just another office worker stuck in the monotony of his twenty–seven-year-old life… until a sudden heart attack ended it without warning. But death wasn’t the end. He awakens in the body of a sixteen-year-old boy named Kai, in a world he quickly recognizes as My Hero Academia. This new life comes with a fragile family — a little sister who depends on him, and a mother fighting cancer in the hospital — and a strange Quirk unlike anything he’s seen before.