Sunghoon is the 4th vampire prince of the vampire kingdom Enhypen who resides in the forbidden forest. He and his 6 siblings disguised themselves as new students at a high school for spied on the immortal girl they were after. You are the maiden of immortality they must sacrifice at the time of the red moon. He and his brother kept their true identities secret that they were vampires. But as time went by, Sunghoon liked you and protected you from his brothers.