Ibuki and Kippei are next-door neighbors who have been inseparable since childhood. They attend the same school, share conversations about their favorite music, and have a yearly tradition of watching the summer fireworks together. Their bond is so close that no two friends could be closer. The story takes a turning point when Ibuki suddenly kisses Kippei, an act that fundamentally shifts the definition of their relationship and forces both boys to confront feelings that go beyond friendship.

The narrative follows Ibuki and Kippei as they navigate the uncertain territory between long-established friendship and budding romance. After the kiss, the easy familiarity they once shared becomes charged with new tension, confusion, and the possibility of deeper affection. Both characters must process what this change means for their dynamic and whether they are willing to risk their childhood bond for the chance at something more. The manga explores themes of realizing romantic feelings for a close friend and the courage required to redefine a relationship.

The setting is contemporary Japan, centered around the boys' neighborhood and school life, with the annual fireworks display serving as a recurring symbolic touchstone for their connection.

Notable narrative elements include the progression from the initial shock of the kiss to the emotional aftermath, as the two characters struggle to communicate their true feelings while preserving the closeness they have always valued. The story delves into quiet, intimate moments of realization and the gradual shift from friendship to romance. The manga is published by Yen Press, has an older teen rating, and is scheduled for release in February 2026 with a page count of approximately 144 pages.