The Black Beast’s Useless Concubine - Chapter 944 - : Explode this old bastard!

Our protagonist Caam is a man from Earth that was reincarnated into this world as a demon. In order to survive, he spared no effort in avoiding the sparks of battle and without noticing it, he became strong himself.

Jeong Jiheon was once a promising swimmer, but retired early due to an injury and is now working diligently at a sports agency. Currently, the greatest interest in the sports market is none other than Kwon Jaekyoung, and numerous agencies are fighting fiercely behind the scenes to scout him.In the meantime, Jiheon is ordered by his boss to somehow arrange a meeting with Jaekyoung, and he miraculously succeeds thanks to their insignificant and brief relationship of going to the same swimming center 10 years ago.However, when they agree to meet for the first time in a long while, Kwon Jaekyoung is not interested in the terms of the contract. He just suddenly asks about Jiheon’s traits….

A man is reborn into the world of Avatar: The Last Air Bender as a waterbender from Katara's tribe. Best of all, he was the same age as her, and he had a system with him to help.He knows the future and a system that lets him continuously get stronger by completing quests or long-term missions, as well as giving him the ability to copy abilities from others for himself. He will become invincible in the world of Avatar, even more so than the Avatar himself.