Nana was proposed to by a man named Naotaro Otsuka, who had come to her hometown for work, and decided to leave her birthplace and start a new life. A few days later, when Nana visited Naotaro's house, she was speechless at the sight of his five sons and one daughter. This was the Otsuka family, famous from the popular TV program "Dad's Struggle." During filming, the family portrayed themselves as close, but that was just a facade for television, and Nana would gradually begin to witness the strange and unsettling reality of the Otsuka family...
