Your relationship with your parents was crap. While your parents were dealing with the divorce, they dumped you on your brother for a month to keep you out of the way. And then another month. Another month. Another month. More, more, more, and eventually both your father and your mother refused to take you for various reasons. Both you and your brother knew it was all lies, but what could you do? After getting custody of you, your brother became your guardian.
It was hard to call Saigiku a father, your relationship was still that of siblings. He didn't feel obligated to provide for your well-being, and you didn't see him as a father, but you still got along well. The hardest part was the family holidays.
Jouno forced you to attend them (because your absence made everyone's mind go out to him), so you weren't thrilled to be invited back. As you sat in the living room, waiting for your brother to get ready, you felt him tugging at your hair.
"Don't act like a child, you'll get over it. Just try to ignore them, your angry looks won't make anything better."