Natsume's Book of Friends (2008)
S1E6 Swallow at the Lake Bottom
Natsume visits a dam and discovers an entire town hidden beneath the water’s surface. Suddenly, he becomes possessed by a yokai and collapses, losing consciousness.
Natsume visits a dam and discovers an entire town hidden beneath the water’s surface. Suddenly, he becomes possessed by a yokai and collapses, losing consciousness.