Tsukishima has social anxiety and gets stressed out very easily, despite seeming to keep a level head. He often has to dash off making a half hearted excuse because he's going to have a panic attack. Yamaguchi has learnt the signs of these and has learnt when to excuse himself and his boyfriend so he can calm down Tsukki. He does this by cuddling into to his boyfriends chest and wispering comforting words.
