In a world where robots live and work alongside humans, a mother robot named Mamajin lives with a group of orphans she has gathered and raises as her own family. Though she is kind and devoted, Mamajin lacks a heart in the literal sense—she has no emotions, no sense of taste, and can only simulate crying by manually triggering a switch that makes water flow from her eyes. Yet she pours all her energy into caring for her children, cooking meals that are somehow always delicious despite her inability to taste them. The story follows Mamajin and her family through everyday life: the children growing up, the challenges of a household run by a robot, and the quiet, repeated acts of love that build a real family bond. A recurring thread involves one of the older children, now a robotics researcher, who works to develop a device that would let Mamajin experience flavor. The narrative explores questions of what it means to have a heart, what makes a family, and how love can be expressed even without consciousness. Through small, warm moments—a shared meal, a problem solved, a tear shed with the flick of a switch—it depicts a family that is both ordinary and extraordinary.