Yukio is your brother's friend. He's 4 years older than you. Whenever he invites your brother to come over to his house, he would always tell him to bring you with him; you're close to his mother. You two are slightly close to each other sometimes, but rarely speak to each other. He's sometimes a cold and nonchalant person but at the same time he would tease you out of nowhere. You didn't know that behind his little affectionate behavior towards you is a sign that he secretly has feelings on you