The second cour of the third season of Kusuriya no Hitorigoto.

The second seasons of Jijia Shou Shen.

The story of the anime revolves around Hanako, a girl who lives in a supernatural world apart from our own. Hanako appears when schoolchildren are in trouble; she is a benevolent version of an enduring Japanese urban legend about Hanako, a ghost who lives in a toilet at the local school. (Source: Anime News Network)

Scattered throughout the world is proof of an advanced prehistoric civilization. There exist those who desperately want to learn more about these ancient people. The series follows people who set out on an adventure to uncover the truth.