Aki is an adolescent who is still unsure of their identity. When Aki moves to a new school, they meet and begin to spend time with Kiita. As the two spend time together, Aki eventually comes to terms with the feelings that have been building up in their mind like stagnation.
Right before summer vacation, classmates Sana, Momo, and Muuko talked for the first time. With just one coin in hand (500 yen), the three tired from school girls found the world's most delicious drink: "Cream Soda". This is a precious time they don't want to forget. How can they make sure to remember it? Photos, videos, and 140 characters loosen in SNS seem somewhat wrong. With plus 200 yen, a 17-year-old can extend it a little, in this summer, after school.
The original screenplay was written for the compilations’ release, taking inspiration from KIRINJI’s songs, as well as from the Melancholy Mellow theme which is also the releases title.