That Time an American was Reincarnated into Another World - Chapte 249: Selfish Man

Five years ago, she was forced to marry into the Quinton Family. Her mother-in-law disliked her, her husband didn't love her, and she suffered cold treatment and various torments.Five years later, she strongly divorced him, but accidentally overheard a shocking piece of news; it turned out that the one who spent a night with her back then was not her ex-husband.The little lady adored by everyone in the Quinton Family was actually her child.She was determined to win back her child but ended up provoking the Quinton Family's most formidable man. With a cold face, he took her back home...

In a peculiar twist of fate, Lee Taeok, found himself in an extraordinary predicament. Little did he know that his scathing critique of a popular novel, ridiculing its blatant naivety and overly innocent take on romance, would set in motion a perplexing chain of events, ultimately leading to his unexpected rebirth as the delinquent character, Baek Taeyang, from the very same novel.“You should have taken better care of your girlfriend.”In the world of the Academy Sweet Love Diary novel, Baek Taeyang is destined to “rescue” the heroines.

When an era came to an end, various forces set foot in cultivation to compete for immortality. A young boy who spent most of the time sleeping got lucky in the troubled times and became an unparalleled immortal who could cover the sky with a snap of fingers. Was he going to live forever?

- Description from Novelupdates

A man reincarnates in the body of a boy who suffered a tragedy, only to realize that he is in the world of My Hero Academia. What's even stranger is that his quirk seems to have the abilities of Nen and Haki.