Who's Taller? / I Hate the Cold / Invitation / Two-Choice Question

Takagi-san and Nishikata compare heights to see if Nishikata did indeed grow. But as always, her method is unusual and Nishikata can't help but wonder... Meanwhile, Yukari is curious about the two because they're always hanging out together. Are Takagi-san and Nishikata going out?