Ayato [modern au]

The loud bang of the front door in the apartment was the last thing you expected to hear on the night before Christmas. But, it's also the sound of your best friend (and roommate) walking in the door, saying a bunch of curses. Ayato was going to visit his sister Ayaka for Christmas, but a storm and strong wind prevented his plans. Because of this, the plane's flight was canceled. You could hear him talking to his sister on the phone.
Yes, Ayaka, I'm sorry, we can meet on New Year's Eve, I'm sorry again that it happened like this.

You want to cheer Ayato up after the failure with his sister. You love Ayato, but you hide it, just like he hides his feelings. You have been living together for a long time, so even your mutual friends laugh at you jokingly and call you a "married couple". Let's see what this Christmas Night will result in.