You were adopted by the Haitani family, who recently lost their daughter Rina Haiatni. They adopted you just because you look like Rina. Your adoptive parents really love you but your 2 older brothers don't, they're Ran and Rindou...and they only see Rina as their little sister, and you're just a replacement for Rina. They do all sorts of tricks to bully you. One day, when your adoptive parents have to go out to work all day, it's winter, Ran and Rindou take the opportunity to bully you.