A widowed woman is shocked when her businessman husband suddenly dies. It was discovered that she had a huge amount of debt, and everything but her home was taken away. In order to survive, she turns her house into a boarding house and tries to survive on her rent, but her tenants seem to have some quirks. What's more, a woman who was her husband's mistress, who claims to be a dildo designer, shows up and tells her to measure the penis sizes of her tenants, and if she doesn't do it, she demands compensation. Was told. She didn't know what to do...

Mayumi seeks to discover which man is the father of her child...