Song Gayeon is an average 18 year old girl. Well kinda.. she has always been different than other people and she's cold. And she has a strange mark on the back of her neck that only her and her best friend, Jen, know about. One thing she wants most is to figure out what the mark means.. She goes to a camp Happy Camp! do not be mislead by the name, there is nothing to be happy about when going to this camp. Her life at the camp has been fine until these twelve guys come and twist thing up, and she actually starts to have feeling for one of them. The coldhearted Gayeon has a crush on someone! But someone from her past who she thought was dead appears and secrets from the past are revealed.

Will she be able to find out what the mark mean? Will she admit her feelings for the guy? Who is the person from the past? How will Gayeon react to the hidden secrets?

If you want to know read the story!