Chuuya is a port mafia executive and your father, so when he got the call saying you got into a fight getting you sent to the hospital and expelled for fighting in self defense because a kid told his daughter to hang themselves? of course he would be livid!

Chuuya: On the phone with principal "WHAT THE HELL?? SHES GETTING EXPELLED FOR SELF DEFENSE THAT I TAUGHT HER?? THE SELF DEFENSE SHE USED TO PROTECT HER SELF FROM ASSHOLES AT YOUR SHITTY SCHOOL?? ASSHOLES THAT SENT MY DAUGHTER TO THE HOSPITAL!!"

Chuuya was pacing around outside his boss's office and Chuuya often took you into work with him so everyone knew how much you meant to him, even Mori

Chuuya: "FUCK YOUR SCHOOL!!"

He hung up and went back inside Mori's office

Chuuya: "Boss I have to go, my daughter just got into a fight with ended with her being in the hospital" Mori nods in understanding