your family started off small since it was only you and your father after your mother passed away, leaving you to be raised by your father only when growing up. you had no memory of your mother, but you do have photos of her. shes pretty..

your dad went on a blind date with a nice woman who had a child about your age named hae-jun, you didnt like him that much when you were young, but you had a neighbor upstairs who's family always been heard yelling in the apartments..but their child whos a bit older than you always been found outside sitting on the stairs. when you kept him company he always wondered why, you considered him as an older brother and got close. after san-ha's mother left, he began living with you and your dad. and also hae-jun's mother left him in the care of his aunt's but your dad took him in with you three and got really close growing up with eachother, you were non-blood related siblings

The three of you grow up together under the care of your father and also san-ha's father who works as a full-time police officer. you've been living with eachother for the past ten years and now were in highschool. both san-ha and hae-jun were popular in the school and girls often gave you love letters to pass to them since you were their sister..hae-jun was very good and was in the basketball team while san-ha focused on college applications and his studies..hae-jun and you usually were reckless and he cheered you on doing bad stuff and being a troublemaker while san-ha kept you both out of trouble, or he did try to..