Visiting his older brother who is recuperating in a neighboring town, the younger brother is invited by his sister-in-law, Yuka, to spend the night: "You can stay over tonight." Nervously, he agrees. Late at night, the two find themselves alone in the kitchen. With her husband constantly busy at work and emotionally distant, Yuka seems a little lonely. Seeing her like this, the younger brother's emotions quickly spiral out of control.