My Girlfriend Is A Cute Plain Jane With Short Hair, But She Got Fucked By An Underground Loan Shark And He Impregnated Her. Natsu Sano

Takuro's father was in debt to a loan shark. While his father was away, Takuro and Natsu were trying to enjoy their youth when the loan shark, an older man named Ozawa, showed up. Takuro was secretly worried that Natsu, who was taken away as collateral for the debt, might be subjected to lewd acts, but later, Natsu defended Ozawa, saying he was a good person and that nothing had happened to her.