What emerges from the peculiar egg Mariko-san brought home with her, but an equally bizzare tadpole-like yokai with an arm growing out of its belly! The hatchling immediately takes a liking to Yushi, forcing him to walk a mile in a new mother's shoes! Meanwhile, the mishap also prompts Mariko-san to reveal her shocking past to Yushi, and in doing so teaches him a valuable lesson about the pursuit of happiness...