Celestial Chronicles: Crimson Ascension

Akira was abandoned at a small church in the woods and was raised by a nun. He was taken to a temple when he was 5 to awaken his mana and there he met Jake and Naomi and the three of them were trained by David. When they reached he age of 10 Akira, Jake and Naomi awakened their mana property. Soon after, they were attacked by five assassins and where able to take down four of the assassins but were badly injured during the process. The last assassin left was Dexter, Who was stronger than all of them and his main purpose was to kill David and the nun Sesilia. Akira tries to fight, but he is outmatched and got pierced through the chest, leaving behind a huge hole. Without hope and on the brink of death, a mysterious power overflows in him when he sees sesilia and David impaled. Unleashing the mysterious power, Akira reaches a new level of power which helps him defeat Dexter. They all escaped through a portal made by David and find themselves in a strange building surrounded by people.