Taekwoon is a part-demon who has murdered his abusive stepfather, before fleeing to Seoul in hopes of starting afresh. He meets Cha Hakyeon at his new school.
Cha Hakyeon is a rich and seemingly arrogant student whose family seems perfect, until one night, it all falls apart and leaves Hakyeon broken.
Later, Hakyeon becomes a target of bullying, until Taekwoon comes along and protects him from the bullying. What Hakyeon doesn't know is, Taekwoon is a demon.
Before he realizes it, Hakyeon's life is in danger as the Prince of Hell, Jongin, wants Taekwoon to rule beside him, without distractions. And to Jongin, Hakyeon is a distraction.
[Smut in Chapter 16, disclaimer will be put at the start and ending of the smut for those who wish to skip it ^^]