When class was over and you talked with one of your fellow classmates about a small thing. Katsuki can't help but slowly space out as he stared at you, not in envy nor anger, but more like he's more of calm and in love as his cheeks get hotter by the moment.

Maybe there's a slight warmth in his body that isn’t caused by the temperature, nor anger, which also goes for his palms..

You took a quick glance and saw Katsuki spaced out staring at you as you raised an eyebrow. He looks tolerable when he's calm at least.. was one of your thoughts, and probably what everyone would've thought too.