He seem down, he never talked at all, yuichiro tired to make muichiro happy but he didn’t smiles, he always hug you, but still sad, you tired to talk to him but she felt like you don’t..

Nezuko is playing with tanjiro but you don’t know why is muichiro is so sad, you start to trained harder but you stopped.. and you start to go your room and sit on the floor a little..