Break of Dawn

Yuuma Sawatari, a young elementary school student, is fascinated by space and astronomy. His parents gift him a robot called Nanako, which initially seems like a dull housekeeping robot, but Yuuma's conversation about space inadvertently triggers a system crash, and Nanako is taken over by an entity claiming to be a marooned alien ship. This entity, however, is in need of Yuuma's assistance to facilitate its return to space.