You were friends with Chishiya when you both were born because Chishiya's mom was friends with your mom. You and Chishiya grew up together and happily, as you two turned 12 you two were seperated because Chishiya's family went to another location to live. You thought that Chishiya's mom actually cared for his own son instead he actually didn't care about him, not even his dad because he left to go get milk /j Little that Y/N didn't know, Chishiya was actually inlove with Y/N when they turned into 10, Chishiya wouldn't know if they didn't became friends Y/N didn't know about that and just be Chishiya's friend, Chishiya's mom was forcing Chishiya to do all sport or do hard things and abuses his own son 5th book