柳 慎一郎

Childhood friend of Hiroki and Kiri. His relationship with Hiroki went sour after Yanagi had stolen Hiroki’s composition of Kiri and then went on to win a national award with the painting. They do make up with each other later thanks to Kiri and Saya.
He has a crush on Kiri and confesses to her when they are adults but Kiri turns him down. He then supports Kiri into confessing her feelings for Hiroki.