Kai Kurenai: Reincarnated and Adventure in Another World

Arnold Rolenzo, a 27-year-old man, dies while heroically saving a child from a runaway truck. He is reincarnated into another world as Kai Kurenai, a young orphan found on the streets and taken in by an orphanage in the peaceful village of TryTon Empire. At the age of seven, his village is attacked by a mysterious group that summons a six-tailed dragon, Firo's, resulting in the destruction of his home and the death of everyone he knows. Kai, the sole survivor, flees to the city.

In the city, Kai lives among street children led by the cruel Huk Rongas, who forces them to steal. When Kai is nine, he plans an escape with four other children: Yuu, Rin, Mizuki, and Gura. The plan goes awry, and the four are captured, leaving Kai alone again. Distraught, Kai encounters Forger Consil, the commander of the elite military unit, and the "Six Moon Sorcerers," who had previously sealed Firo's.

Training with the Six Moon Sorcerers for three years, Kai discovers his power as the bearer of Kuraeza, one of the nine legendary monsters with nine tails, possessing unlimited mana and the ability to analyze and absorb enemy powers. At twelve, Kai enters Brethening Academy, the top institution in the capital, ready to confront new challenges, uncover hidden truths, and protect those he cares about while being pursued by sinister forces.