Lee Jeno had no intention of getting married if it wasn't with Na Jaemin, his first love in high school. But after school graduation, Jeno never even met Jaemin again. Until 4 years later when Jeno was working, they met again with Jaemin's status on death row while Jeno was the executioner. Jeno must be willing to see the person he loves die in front of his eyes with his own two hands. Jeno suddenly wakes up in the past, the first time he entered high school and met Jaemin. There was no clue why he was repeating the past other than Jaemin's handwritten paper he was reading. 'If only I didn't meet you, didn't like you, maybe I could still live.' Lee Jeno x Na Jaemin