Itsuki Azuma lives with her son Eiji, who uses a wheelchair, supporting each other through life's daily struggles. Though their routine is tough, they've managed to endure together. However, the debt left behind by their deceased husband and father casts a dark shadow over their lives. When Eiji discovers his mother being forced to sleep with a loan shark to extend the repayment deadline, he is shocked to the core, and the bond between mother and son takes a shocking, irreversible turn...