Years after their intense psychological warfare ended, Kaguya Shinomiya finds herself alone in her room, looking through an old photo album. The pages are filled with pictures from her time at Shuchiin Academy, where she served as the student council vice president alongside the president, Miyuki Shirogane. After a long battle of wits to force the other to confess their love, the two geniuses finally began dating.

As Kaguya turns each page, she is flooded with nostalgia, reliving the wholesome and often silly memories of her high school days with Miyuki and their friends on the council, including the energetic Chika Fujiwara, the earnest Yu Ishigami, and the stern Miko Iino. This television special steps away from the series' signature comedic mind games to offer a more reflective and emotional journey. The story unfolds through a series of flashbacks triggered by the photographs, depicting the early, awkward, and tender days of Kaguya and Miyuki's official relationship as they navigated being a normal couple after so many years of elaborate schemes. More than a simple continuation, it serves as a nostalgic look back at the steps the characters took toward adulthood, filled with moments that are by turns funny, warm, and bittersweet.