Jo works at a construction firm and has raised his daughter alone since losing his wife to illness fifteen years ago. Then the nursery where his daughter works closes for a week of renovations, and she decides to take the chance to travel alone. Jo hasn't so much as done a household chore since his wife died and is completely lost. Taking pity on him, his daughter asks her childhood friend Rei to help around the house. She's someone he's known since she was small, practically a second daughter. But Rei has grown into an adult, and her face and her body have turned bewitching, and for the first time in over a decade Jo feels the heat rise.