It's the year 2050 and Japan has been ruined by desertification, Soshi Sawamura is a soldier in the Saitama Nation's military. One day he meets Nadeko, a girl diagnosed with the modern epidemic which makes her a "Flower Girl." They get acquainted and then get caught in the middle of a guerrilla ambush and are cornered by the enemy. That is when Nadeko asks Sawamura if she can fall in love with him. The moment he agrees to accept her feelings vines and branches sprout out of her body...?! This is a heartful story about the fate of the girls fighting strongly for their love and dreams in battle despite their sad fate.