Rororro!

Twelve-year-old seventh-grader Chitose Morishige has no friends, so her father, Professor Morishige, builds her a robot companion. But the android, Ichika Robata, looks so lifelike that Chitose thinks she is an ordinary human girl who has either run away or been kidnapped by the professor. Ichika repeatedly tries to prove that she is a robot, but her attempts lead to hilariously disastrous results.