A video commemorating the 10th anniversary of the founding of Ippondo. - Yuna and Kei are childhood friends who live in the neighborhood and have been friends since elementary school. - She has been with Yuna since she moved to this town ten years ago. - Now they go back and forth between each other's houses without any hesitation, and in a way they are like a family, but Yuna has a secret... - That's what I've been secretly thinking about diameter for the last 10 years. - Ten years after their first meeting, she finally became unable to hide her feelings, and finally made a big decision and confessed her feelings to Kei... - Will Yuna's feelings of 10 years reach the diameter? - ! - Surprised and puzzled by her sudden confession, what is the answer? - ! - A little sad and slightly sweet, and a pleasant spring love story.