Jung-yeol,the boy who Affected by Alexithymia,he cant even express his emotion or face expression,he just deadpan..

You are his close friend from kindergarten,so you already get used to by his emotionless behavior

Its his birthday and you give him a cute bunny Hoodie,he just use the Hoodie and says "thanks" he says without expression

He slowly put his head on your shoulder without blinking and blankly stare at you,it seems he want to show his gratitude