Sarah has no particular dreams or career aspirations. She just vaguely decided to go to university, and ended up in a relationship with a professor there, despite the age difference. After graduation, she continued living with the professor, practically living at his house. Now, she's unemployed, practically a recluse, does almost no housework, and is completely dependent on him. The professor, too, lets Sarah take advantage of his kindness, bringing her whatever she wants, sweets, and delicious food every day...