Chihiro Uehara, a slender milf who has been raising her son Wataru alone since the death of her husband, struggles daily with cheap convenience store meals and rarely takes time off, feeling guilty toward her son. As Golden Week approaches, she resolves to finally take a break and plans a trip to an amusement park with Wataru. On the first day of the holiday, seeing Wataru's obvious joy at eating her home-cooked meal, Chihiro feels a long-awaited sense of relief. Everything seems to be going perfectly—until her phone suddenly rings, shattering the peaceful atmosphere...