Female college student Kahoko is a "typical example of overprotection". She relies on her parents to solve everything and grows up without worries. Kahoko is like a "magical human being cultivated in a sterile environment". At the age of 21, she has reached the age to find a job, but let alone a part-time job, she has never even picked her own clothes or taken a tram alone. Only others took pictures of her, and she has never pressed the shutter for others. Such Kahoko finally walked out of the antibacterial greenhouse and plunged into this world full of bacteria. Then she realized that "she is different from others". However, the mother who treats her daughter as a best friend and the father who is overly dependent on her daughter cannot maintain their inner balance, leading to the family's disintegration. At this time, Kahoko and the people around her discovered the true power sleeping in the heart of Kahoko in the "greenhouse". She went through various trials and struggles, and finally became the queen of the small kingdom of "family".