For the rest of the day nobody talked to Shiro. Rather then saying it was because he was in a general bad mood, it would be more accurate to say that he looked sad and lonely. Everyone knew who his father was and until now Shiro seemed okay on the outside. So they really didn't know how to handle a Shiro that looked lonely. In the end they all just did the same stuff as usual, which is not talking to him and leaving him alone.