Mami lost her husband and lives with her beloved daughter Yui in her parents' house left by her parents. One afternoon, Mami is burglarized while she is away. The culprit is Sugiura, who works at Mami's part-time job. It was a crime after being unable to turn his head due to debt. Mami, who was unfortunate enough to meet Sugiura, who was looking for money and goods ...