Toaru Majutsu no Index: New Testament - Volume 8, Chapter 3: Doubt at the Edge of Decision. Turning_Point.

This is a world where a king is the most powerful.

The chairman of the White House of ‘City A’ and his wife died in a plane crash, leaving their 3-year-old orphan with a large fortune. The relatives were trying their best to cheat the girl and enter the house to get ahold of it. But who knew that the ’10 billion-dollar doll’ would have chosen her father, or also known as the city’s most popular guy, on her own…

Luo Sheng: “f*ck, I’m not doing it!”

Yinyin: “Daddy, hug!”

Luo Sheng: “….”

A few days later —

“F*ck, who dares to bully my daughter? I won’t let him get away with this!”

- Description from Novelupdates

I exist in the darkness, disappear under the bright light, and will eventually devour the sun and turn into the shadow of all things… Known by people as the indescribable terror of darkness; the king of shadows; the dark day; the existence of the shadow of the world , is still just a somewhat special high school student, facing a weird death game…

- Description from novelbuddy

Dying at a young age after a disappointing life. Mat thought he hit the jackpot when he got reincarnated on a tropical island as a baby. Here, exploring mysterious lands and learning magic are a reality. The world of Elydes is beautiful and magical, wild and savage. While the Guide is impartial to all, people are not. Mat has the lowest starting point possible, and those like him rarely go far. To not let his humble birth define his life, he'll need to find the determination to grow stronger and delve into the mysteries of Elydes.