I swear if Nanashi doesn't give us a confession scene soon... Hell, just have them confess this christmas and show their dating if you don't want to end the manga.
Så trevligt!
Thank you @Hezkezl for explaining the background to this torrent of comments, I have a hard time following all the antics the young'uns devote themselves to these days.
Anyone taking bets that they will miss the last train and have to find a hotel for a "short rest"? With all the attached embarrassment and hysterical explaining, because of course nothing ... remarkable ... will happen.