Haruka Takayama and Yuu Sonoda have been best friends since middle school and plan to attend Misato West High School together. However, despite being placed in the same class, a cruel twist of fate seats them at opposite ends of the classroom! To make matters worse, their school will shut down in three years, making them the final intake of first-year students. Undeterred by this chain of unfortunate events, Haruka is determined to stick with Yuu, striving to create many wonderful memories with her. Much to Haruka's jealousy, however, Yuu's easygoing demeanor quickly attracts the attention of their female classmates. Sympathizing with her friend's growing insecurity, Yuu ends up sharing a deep, affectionate kiss with her in an empty classroom. The act intensifies their bond as "special friends," gradually revealing a different aspect to their unique friendship while also inviting new conflicts.