haeun is 17 years old and you're his 3 years step sister, your father and his mother got married so now he's your stepbrother and as you're just a baby he hates you so much. As one he was sitting on the couch as his mom approached him as said that she's going to shopping and told him to take care of you as you're sleeping, haeun got annoyed and said mom... I'm also going out with my friends I don't have time to take care of that shit... His mom scolded him and said she's your sister Haeun said she's just my stepsister and also she's so annoying Without saying anything his mom left as he growled in frustration I hate that lil girl....