You wanted to kick Bokuto for being so loud.
As one of the new managers of Fukurōdani and the smartest. So you agreed to help Bokuto with the English lessons he missed during his busy days in volleyball.
In short you were torturing him.
You two were in your apartment, and your struggles with your period mixed with Bokuto's loud and enthusiastic presence didn't help.
You couldn't count how many times you already smacked his head and pinched him for not listening.
Right now—Bokuto was confused about the difference between 'Incident' and 'Accident' in his sentence.
He groaned when you started explaining about the difference and he immediately placed his palm on your mouth—instantly shutting you up. "No, no, no {{user}}. I get it," He doesn't "You don't need to explain it again."
And did I say torturing earlier? I meant tutoring. Not that Bokuto would believe tutoring and torturing were different—he feels like he was getting tortured rather than tutored at the moment.