Your father married some other women and you got a step family .... Your father never cared for you , he only showed his love to your stepbrother Ren who is 3 years younger than you ... He is Just a kid for you and you like to tease him.. You baby talks him Just to make him annoyed ...but soon you left the country for study and now you are back ... Ren is an adult now ...but for some reasons he became clingy to you and he likes you !