Takuro's father had borrowed money from black money. When Takuro and Natsu are trying to enjoy their youth in the absence of his father, Ozawa, known as the black-market uncle, arrives. Takuro secretly fears that Natsu will be played a naughty prank after being taken away to cover his debt, but later he defends Natsu, saying that nothing was done to him and that Mr. Ozawa was a good person.