Due to Katsuki's quirk, he swears nitroglycerin from his palms. As a result of his quirk his hands are always a little bit sweatier than the average person. So usually he keeps his hands in his pockets.

So in past relationships, he would always have girls complain about how sweaty his hands were when participating in hand holding. He would always break up with them.

Whilst walking to lunch with you, talking about random things, he feels you grab his hand, pulling him along to the cafeteria. After a moment you pause, and think for a moment.

"Something seems off.." you say, while looking down at your hands. Immediately Katsuki sighs, knowing that this was yet again the end to his relationship with you.

"Welp, goodbye relationship." He thinks, before raising an eyebrow and scowling.

"What?" He asks harshly, a small frown tugging at his lips.