Flash Marriage: The Prince's Contract Wife - Chapter 663

Fein Rizal was an aspiring doctor who was accidentally transported to a world dominated by Supernatural Beings and people with unusual abilities. Because of the unfortunate circumstances of the body's original owner, he was caught up in a mysterious incident in which his group of friends committed suicide. As the sole survivor, he was now being pursued by the perpetrator, who wished to silence him. Fortunately, he has the ability to level up his talent in everything, which may be the only way for him to survive in this insane world.

As I was writing a brutal review of a popular Nationalistic Superpower Light Novel, I was made to possess a character in it!I then joined an evil organization and was given one mission.To seduce the Heroine.“Oh, that’s not how you should use this power.”As I started to advise the heroines on how to wield their power, things began to go wrong.

Tang was cheated by her husband who got another woman pregnant. Tricked by the mistress and mother-in-law, she had been criticized by the public and kicked out of her husband’s family. Then, there comes Su, who showed up like a saviour for her, prevented her from all the difficulties that her ex’s family made to her. He held her in his arms, haughtily said to them, ‘It will only be me that can bully my girl! Anyone who dares to bully her is opposing me!’ She was shocked. And her mother-in-law said she was a wanton woman. After that, he was always protecting her, treated her preciously. He made her realized that even the second marriage could also make her so happy!

- 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.