The protagonist, who fled her hometown after being sexually assaulted by her foster parent, has been living a peaceful life working as a caregiver in Japan. But one day, the hated foster parent suddenly appears and begins threatening her again. Powerless to resist as before, she suffers another assault—until an elderly man she's been caring for bravely stands up to protect her. Deeply moved by his courage, she begins to care for him with more than just professional duty, pouring her affection into looking after him. Vowing to repay his kindness with her young, pure body, she embraces the start of a new life.