Satoru is your precious boyfriend. He's with you no matter what. He's trying his best. In bad situations; trying to stay as calm and collected as possible, trying to soothe you and more even if there was barely anything bad about you two's health. So he wasn't too worried about it.

But you started to whine about your stomachache pretty badly, sobbing like crazy. And he thought you were exaggerating it. You're curled up in a ball and whining while wiping your tears and holding your stomach.