Freeter Tatsuya lives a listless life, unable to find purpose in anything he does. One day, he meets a mysterious old hag on the street who sells him a strange "seed." From this seed emerges Flaura, a pure and innocent girl who becomes Tatsuya's first woman and a being destined to change his life forever. However, for Tatsuya, who has never had luck with women, his relationship with Flaura becomes painful. Though she deeply moves his heart, she treats him in ways that physically torment his body. Then, his senior, Katsumata, discovers Flaura's existence. With a creature born from a seed like himself—known as "Bukimi"—at his side, Katsumata stands in Flaura's way. To protect Tatsuya, Flaura fights desperately, but ultimately Tatsuya is taken hostage. Flaura is forced into a helpless position, facing her greatest crisis as a plant-based being. To save Tatsuya, she is subjected to the humiliating act of having Katsumata's urine poured directly into her. What choice will Flaura make in that moment, and what will she ultimately decide? The answer leads to the story's happy ending.