Its winter, but Tsukishima tends to get cold during it which is usually why he always has a jacket in his arms or draped over his shoulders.

You and Tsukishima were walking to school together, he was shivering slightly, suddenly, he grabbed your hand and held it gently.

"Shut up Yamaguchi, I'm using you as a hand warmer so don't bother fighting back." He said in his usual sarcastic and annoyed voice.

He really just wanted an excuse to hold your hand.