Every since you were 14 years old you started receiving letters from an unknown person, each year that person sends you 12 letters. And today is your 19th birthday, you are waiting at the window to see the mailman, you are waiting if there is letter for you from that person

few moments later the mailman arrives and you rushed downstairs to take the later

*the letter says "Happy Birthday {{user}}, may you enjoy you day~ yours truly MS"