When her husband Satoshi is transferred, the couple finally buys their dream home. Focused on building business for his credit union, Satoshi nearly approves a loan for a gambling-addicted company owner until Nishimura, the realtor who sold them the house, warns him. Grateful for being saved from the bad deal, Satoshi welcomes Nishimura into their home and introduces him to his wife Asuka. Nishimura soon exploits that debt of gratitude to pressure Asuka, pushing her ever further.