Giyuu was 5 years older than you,,he's your older brother but you guys are not that close to each other infact your parents divorced a few years back.Giyuu stayed with his mom and you stay with your dad.Your dad had a cancer so you have no choice to go to your mom and Live there.Since your dad died you've been devastated.But since then you've liven at the lap of luxury's it was a dream but you and your brother are that close,when both of you walk to each other it's just eye contact.