After retiring from his position as a soldier in the technologically advanced city's government, Fay Ryu Kazuhiko anticipated a smooth transition into civilian life. However, General Ko's summons shattered his expectations and dashed his hopes. With a leaf imprint on his hand, Kazuhiko was tasked with delivering a mysterious package named Suu, a girl with white hair and green eyes who was discovered singing in a birdcage-like structure. Suu's only demand was to be taken to Fairy Park.
Kazuhiko's companions, Lan and Gingetsu, prepared to take the girl to the park while he considered Suu's past. However, their transportation was stopped before they could depart, and they quickly realized they were being pursued by Bols, a man who seemed familiar to Kazuhiko and had a mission to find Suu. As they journeyed forward, the truth about Suu's identity and her connection to Kazuhiko gradually emerged, culminating in a single word: "clover."