The Story of the 1 Litre of Tears special takes place after the events in the main drama. The Special takes the view of Asou Haruto who is remembering life the way it used to be before the events of the last episode of the series.

Shimada has been failing auditions one after another and worked as an extra in films. One day, his senior colleague invites him to audition for a company called "Friendship," where actors pretend to be the person the customer wants them to be. Accepting the job, he encounters a customer, Mio, who is planning terrorism.

Mizuki's husband Yusuke has been missing for three years. He suddenly comes back home as a ghost and asks Mizuki to go on a trip with him. Their trip consists of visiting the people that helped Yusuke on his previous travel.