Everyone has a circle of friends they hang out with. But even within a small group there are smaller groups of friends, best friends and, here's where it gets complicated, boyfriends and girlfriends. Sometimes relationships just develop in a way where you're not exactly sure what you are to the other person. Which is the problem Tsukimi has when it comes to Io: he seems to be totally clueless about how she's starting to feel. It's a puzzle she'll have to solve in Place to Place.