Since I cannot go back to sleep this morning and it's too early to open presents at my house, I will open a present for you guys (OST titles).
There's some preliminary information about the title of the theme song, but I'm going to wait until I can get some better confirmation on it. Minori-san recorded the song this week, so there may be some validity for this information. An interesting fact is that Tanigawa actually wrote the lyrics to the song.