Maina lives with her husband. They don't have any children yet, but they are living happily. One day, her husband's father, Kohei, asks her to be a model for his hobby photo shoot, on the condition that she "doesn't even wear underwear." Maina has a situation she cannot refuse. Kohei's help has saved her family's factory. Kohei's demands escalate, and he sneaks up on Maina when his son isn't looking...!