Personal Fave

One of the best pieces of literature ever put on this earth. MC is an exorcist, his mission is to defeat the evil millennium earl who wants to eradicate humanity using grieving people as his personal weapons. That's the simplest version I can boil it to because anything else is spoiler catagory.

MC has been reading a book for the last 10 years of his life, but one day the exact apocalypse described in the book becomes real. He needs to use his knowledge of the book to survive until the games end.

MC isekai's into a book he was reading and possesses Lloyd, the most hated character who was supposed to die early. He decides to use his knowledge as an engineer to earn money by creating modern buildings.

In a world where 80% of the population has super powers, MC is a part of the 20%. After trying to save his bully from a villain, the number one hero All Might is interested in making MC his student and the future number one hero.

Extra stories where some characters are randomly assigned to heroes for missions. It's a nice way to make characters interact with each other.

MC is a human who got sold to one of the 3 rulers of hell by his negligent parents. The ruler turns out to be a cutie pie and he begs MC to become his grandson because he's lonely as an old man. Grandpa then signs up MC to his own demon school so he can learn and make friends there. It's very sweet but the MC might be more than just a human.

As the title says. MC gets adopted by a mafia don instead of a demon.

MC is the reincarnation of a very famous onmyouji (basically a ghost hunter). He gets invited to a private island as a teach and MC happily agrees only to discover that this is a school for youkai and he has to not only survive but also teach them using his purifying powers to keep them in line.
MC learns how to grow a spine and become a good dependable teacher for his students, discovering his hidden powers along the way.

MC is a calligraphy artist who gets sent to a small village after he punches a judge in the heat of the moment. He learns to grow and change as a person while learning to be a responsible adult to the people around him.