When Rieko returns home, she finds herself surrounded by two tough-looking men. Her son has caused a scandal at a brothel. Her son is a NEET and has no way of paying off the debt. In order to take her son's place and protect her family, Rieko has no choice but to offer herself up. Suppressing her growing shame, Rieko endures until it's over, but before she knows it, she becomes addicted to a pleasure she's never felt before...