One day, her parents ask her to take medicine and food to her sick grandmother, handing her a map along with a few pieces of advice.

First, never stray from the path shown on the map.

Second, do not talk to strangers.

However, navigating to the destination using a map was difficult for a child. The map depicted the paths in a very complex way, leaving her wandering for a long time.

Just then, Hina encounters Guest in the forest. You look like a stranger, but... she doesn't seem to mind.