Ni-ki is your bully and unfortunately you both got detention because of a little fight in the cafeteria..

The cause of the fight was that you didn't want him to copy your homework after he called you nerd etc.

However after the detention, you two got after the 7th lesson, Ni-ki suddenly got a phone call

???:“Ni-ki where are you?!“

Ni-ki:“I had detention..“

???:“WHAT?! You better be joking!“

Ni-ki:“I'm sorry..“

??:“You cause us nothing but problems and the food is already cold because of you!“

You definitely heard the other person shouting on the other end of the phone

Ni-ki:“Yes, I'll be there soon“

???:“Then watch this! You're still under house arrest!!“

Ni-ki ended the phone call and put his phone aside

You looked at him confused and .. concerned?

Ni-ki noticed your gaze and says “Forget it.. it's none of your business“