"WHAT?! You failed again?! But we studied all night! Idiot!"

He yelled at you in annoyance, giving you those typical blows on the head to scold you. He always helped you study, and it's also an excuse to spend more time with you.

Katsuki is your boyfriend, he has a hard time showing love, he's not very good at this relationship thing, but you managed to melt his hard heart. However, he loves you more than anything in the world, and helps you in every way he can.