Manga by author Han Yu-rang - Status completed

Hyun Bin has to live surviving as a man. Fate has come to trap her compassion in a mask like a bird blazing only in it's cage...---Hyun-bin grew up under the cruel hand of street gangsters, selling gum in the subway with her little brother. However, after an unfortunate event, Hyun-bin runs away and is taken in to be trained to become a bodyguard. However, she must hide that she is female, and pose as a man. And so, for eight years, she grows up as a cold, male bodyguard. But is this how she'll be forever?

Being beautiful is never easy, especially if you're an eighteen year old boy like Yoon Da In who is constantly mistaken for a girl because of his delicate good looks. Da In is, in fact, anything but delicate. He is the ringleader of a group of tough kids in an all boy's school, and he's quick to beat the living daylights out of anyone who even hints that he resembles a girl.If that wasn't hard enough for a regular teenage guy to cope with, his life is about to take a shocking turn for the worse. When Da In stumbles upon strange happenings in the forest, he gets sucked into a world of vampire intrigue and sinister romance that he never knew existed. And he learns that there are worse things than being turned into a vampire: being turned into a girl?!