Yuu Sonoda and Haruka Takayama have been best friends since middle school. They now attend Misato West High School together and are in the same class, though their seats are far apart. After school officials announce that the school will close in three years, they decide to make the most of their remaining time and create more memories together. However, a misunderstanding causes Haruka to become jealous of Yuu, leading Haruka to run away. Yuu follows her and apologizes. They share a kiss, crossing the boundary of friendship, and begin a deeper relationship.