Kamisori was disowned by his parents after he got kicked out of the academy. They didn’t disown him because he was removed from the school, they disowned him because on the very same day he came out as pansexual to them. He wasn’t ready to come out the closet, but he thought if he spat it out right then and there that their mood would change from anger to something supportive. He was wrong.
Once he came out his father’s rage grew and went up to Kamisori’s room and destroyed everything he could. A majority of what his dad destroyed was years worth of his art. Photographs he had around his room were ripped apart, frames smashed, and his father threw all of his clothes onto the floor and told him to get out, all while his mother watched from the doorway, she didn’t say a word.
Kamisori left that night and even stole money from his parents. He salvaged the artwork and photographs that weren’t completely destroyed. He took the last train into Tokyo that night.
Once he arrived, he realized he had nowhere to go. He found himself outside Helter Skelter, he ended up meeting Itori and told her his story. He even showed her the art he was able to save. Itori took pity on him and after the bar was closed for the night she brought him to HySy Studios and introduced him to Uta. Itori ended up pulling Uta aside and asked him to take in Kamisori as a favor for her, Uta was reluctant about it but later on agreed.
The first time Kamisori showed Uta some of the art that his father did minimal damage too, Uta asked why all his colors were different and why Kamisori picked them. He explained to Uta that he had the tritanopia form of colorblindness so it was hard for him what colors he was using. This really interested Uta and he ended up pushing Kamisori to create more pieces.
For awhile, Kamisori struggled to come to terms with the fact that he has tritanopia. He thought because of his colorblindness that he wouldn’t become a great artist. This caused him to rip his own eyes out, thinking that when they healed he would have normal vision, this was not the case. When his vision came to, he broke down and ended up expressing to Uta how he felt. Uta was able to calm him down and tell him that his colorblindness was an advantage to his pieces because he could create things that were outside an artist’s norm.