Nana Maeno yearned for a simple happiness with her sickly but kind husband. However, her husband fell victim to a conman guarantor, racking up a massive debt that left him hospitalized and broken. Desperate to repay the debt collectors, Nana's husband's brother appears, offering assistance by using Nana's body as collateral. Initially, it was all about repaying the debt... But after being repeatedly penetrated by her brother-in-law's powerful cock, Nana falls into a hell of pleasure! Brother-in-law, please forgive me!