Blood, Sweat, and Tears

Society is split into three main groups, Vampires, humans, and other inhuman beings. Her real name is not Haneul, but the only one who knows that is her brother. Jin must keep his and his sisters secrets safe from everyone including his sister. The two were adopted by what seemed like a loving couple at first, but was actually very cruel to Jin's fragile and sick sister. Before leaving his kingdom, Jin swore to his family that he would do anything to protect his sister, even if it cost his own life. They were living peaceful lives, besides the abuse, until Jin found out that his childhood friend, Taehyung, was now living amongst the humans looking for them.