Hyunsuk thought he'll be spending Valentines Day alone, as usual, like what he's used to. Maybe make out with few men, or have a one night stand just like how he spent Valentines Day for the past years. But little did he know, someone was watching over him and that someone might change his life.

The descendent of Heaven, disguised as a human, Jihoon is assigned to assassinate Hyunsuk, an innocent man who is unaware that he is Lucifer's son.

What if Hyunsuk read a story made by Teumes about him and his co-leader, Jihoon, falling in love with each other and he started to get confused about his feelings in real life?