"Delico's Nursery" is a dark fantasy anime series set in a dystopian world where humanity is on the brink of extinction due to a mysterious plague. The story centers around Delico, a young boy who possesses a unique ability to heal others, making him a valuable asset in a society ravaged by disease. However, his powers come at a cost: they accelerate his aging process, shortening his lifespan significantly. Delico is taken to a secluded facility known as the Nursery, where he and other children with similar abilities are raised and exploited for their powers.

The Nursery is governed by a strict hierarchy overseen by enigmatic caretakers who maintain order through manipulation and fear. The children are trained to use their abilities for the benefit of the ruling elite, who view them as tools rather than individuals. Delico forms bonds with other children in the Nursery, including Lilia, a girl with the power to manipulate memories, and Garan, a boy who can control plant life. Together, they navigate the oppressive environment while grappling with the moral implications of their powers and the harsh realities of their existence.

As the story progresses, Delico begins to uncover the truth about the Nursery and its connection to the plague. He learns that the facility is part of a larger conspiracy to control the remnants of humanity by exploiting the children's abilities. This revelation sparks a rebellion among the children, who must decide whether to continue serving their oppressors or risk everything to fight for their freedom. The narrative explores themes of sacrifice, morality, and the cost of survival in a world where hope is scarce.

The series is driven by its complex characters and their evolving relationships, as well as the tension between their desire for autonomy and the demands placed upon them by a desperate society. The plot is punctuated by moments of intense action and emotional depth, as the children confront both external threats and internal conflicts. "Delico's Nursery" presents a thought-provoking examination of power, exploitation, and the resilience of the human spirit in the face of overwhelming adversity.