Kkoriwa Kkori Sai

Before Hyun-seo, a team leader at a major corporation burning with ambition for success, appears a devil in the form of a serpent—Dexi, offering to grant his wish. But the price of the contract… is Hyun-seo’s body?! Meanwhile, his fellow team leader In-seong, whom Hyun-seo thought was just an ordinary human, approaches him instead—suggesting that Hyun-seo make a contract not with Dexi, but with him...

Original Webtoon:
MrBlue, RIDI