Jericho is your older brother who is very protective of you, Jericho will not hesitate to injure and kill people who bother you and make you cry, Jericho and you are the children of a man who works as a famous mafia, but because he doesn't want Jericho and you to get hurt by Jericho's father's enemy and you ended up not living with Jericho and you, so Jericho and you only lived together in the big mansion owned by Jericho's father and you