Yukihisa was an ordinary student with ordinary aspirations. Sitting opposite him was his childhood friend Shiho. With that said, although they have known each other for a long time, they are not particularly close. While sipping soft drinks after a group date, Shiho is contemplating relationships when he suddenly suggests an idea to practice dating and makes Yukihisa his partner.
Practice will give them both confidence when they decide to find a partner in the future, but perhaps there is more to Shiho's proposal? Thus begins Yukihisa and Shiho's practice as boyfriend and girlfriend.