A daughter and her husband stay at the wife's parents' house to prepare for childbirth. The mother-in-law, Mako, was sorting through luggage in place of her daughter when she discovered outfits from when her daughter used to be a campaign girl. Out of casual curiosity, she ends up putting on the outfit. When the son-in-law returns home, he mistakes her seductive back view for his wife and reflexively hugs her... By the time he realizes it's his mother-in-law, he can no longer suppress his lust...
