Harry Potter: Eclipse. - Chapter 19:

Luciel strived to survive in a world that was suddenly plunged into chaos by monsters. Unfortunately, the base he was staying at didn’t survive the monster tide. So, after surviving in such a world for 7 years, he died.Luciel thought he had died, but when he opened his eyes, he was met with peaceful modern scenery.After looking around, Luciel laughed with joy and said, “Ha ha ha. I can finally enjoy such peaceful scenery again! No more eating expired food! No more sleeping in the open space! And there is no need to fight daily! To whomever brought me here, thank you very much. I will enjoy this life to the fullest!”He also woke up in the body of a male model who had just signed to be the contract lover of their boss.“Hmm, $5 million and a house in the capital as a separation fee, and $100,000 as an allowance every month. The boss also has a handsome face. Ok, no problem!”Luciel did enjoy his peaceful life for a few weeks, but afterwards he found out that the world he was in was the apocalyptic novel he read in his past life.He didn’t want to live in the same way as his past life, so knowing that he was the lover of the protagonist who died in the first chapter because he ran away, he decided to stay and rely on the protagonist.Luciel just wanted to rely on the protagonist to have a better life in the upcoming zombie apocalypse. However, he was forced to deal with the people flocking around to rely on the protagonist, and he was even forced to fight again just to save him.“Hey! I just want to rely on you! Why do I need to deal with a lot of things?”“It’s not my fault that some things happened.”“What did you say?”“Don’t stare at me with such a cold look. Don’t worry; you can continue to relax and just rely on me. You don’t need to care about anything else, as long as you care about me!”“Huh? Are you still dreaming?”

15 years ago the world discovered magic as well as mythical beings (basically beings from various legends) in another dimension. Humankind learned to summon these dangerous mythical beings and use their power to great effect. Seven countries formed contracts with these “mythical beings” and gained their allegiance as a result. The mythical beings will choose their summoners on their 14th birthday and give them a stigma. Schools have been set up to train summoners and magical swordsman (basically bodyguards that give the summoners time to cast their spell) as a result.

15 years later after the finding of magic Kazuki Hayashizaki is chosen as a summoner and given a stigma to indicate that. This is surprising since males aren’t chosen as summoners due to their low amount of mana compared to females. As the first male to be a summoner Kazuki is under a lot of scrutiny by almost everyone.

To complicate matters his sister (who’s a magical swordsman) is against him going into summoner school to train there as a summoner. Because summoners and magical swordsman have a cat mouse thing going on where summoners look down on magical swordsman as inferior so his sister naturally is against him going there. She’ll stop him even if it means going to war.

Kazuki however is determined to thrive in summoner school and has already determined to give it his all. Even if he’s the lowest ranked student (ranked E) and his fellow students intend to demean him he’ll prove himself as the strongest summoner.

“You mean that Prince Yu wants to marry me?”

“Exactly, young master, Prince Yu wants to marry you!”

“Hell no! Is he out of his mind? Even if woman is a rare species nowadays, as the prince, he could have a chance to marry one. Is it because he got excluded, or maybe he has sexual impotence, so he could only marry a man?”

“No, Prince Yu is charming, majestic, endowed with civil and martial virtues, and also in perfect health.”

“Then why would he marry me?”

“Maybe because of your reputation out there.”

“Reputation? Am I quite famous?”

“Of course. Young master, you’re far-famed.”

“Really? What did they say about me?”

“They said you are ugly, good-for-nothing, short-lived, a freak, with no morals, and shameless…”

…

- Description from Novelupdates

After rebirth, Long Xiaoyuan went into raptures because he was in poor health in his previous life. However, he suddenly found that his soul was in the body of a fatuous and self-indulgent emperor.