So our mc is an omega. He works as a prostitute ever since he was abandoned from his prestige alpha household. It was fine until he got kidnapped and sold in some kinda shady auction.
An alpha bought him. It was some bigshot alpha. His purpose is to have omega has his child and the contract will end. The omega thought the term wasn't too bad so he's like fine.
Anyway, we learnt later on that the alpha did this because he wanted nothing to do with the family and went after his dream. The condition from his dad is have a grandchild for him.
Ijiwaru na Tsukai no Netsu ni Oborete