My Omega Vampire Boyfriend (TaeJin AU - Ongoing)

Long time ago, there was this human name Kim Seok-jin who was accidentally bitten by a vampire but he didn't die. He became one. For a millenium he didn't aged at all. He saw everything happened on that time, he became a History teacher, where he met his mate, Kim Tae-hyung. He told his feelings towards Tae and accepted it but he didn't tell that he was a vampire. From the start of their relationship he thought that he was the alpha but he wasn't, it was his Human boyfriend, Tae.