In a world devastated by war, Sawamura Soushi crosses paths with Nadeko, a pure-hearted girl with a blossom sprouting from her chest. As they form a bond, Nadeko exposes her love for Sawamura amidst impending danger, triggering a potent shield from her budding flora.
Sawamura soon learns that Nadeko is among a team of extraordinary flower girls and their partners, whose abilities blossom with love. But his growing affection for a much younger girl raises concerns about his qualifications as a dependable companion. In addition, they discover that their mutual ardor hastens their flower growth, resulting in a shortened lifespan for the young warriors.
Confronted with a harsh reality, the duo contemplates how to navigate their precarious situation.
