Mai and Yui have been close friends since childhood. The two continue to celebrate the anniversary they first met each year, and if they notice it, it's the last year of the school. The two were trying to spell out their love letters in a "love letter" and hand them over so that they wouldn't notice each other. And the day of confession. Knowing the feelings of each other, they swear eternal love. The thoughts of the two people who recruited for the recruitment forget the time and place and seek each other. Document lesbians are recorded after the drama ends. Two of my best friends, even in private. Before shooting, they wrote "love letters" in secret. What was the real face they showed?