Mayoiga

Mayoiga (迷家, lit. "The Lost Village") is a Japanese anime television series produced by Diomedéa, directed by Tsutomu Mizushima and written by Mari Okada, with character designs by Naomi Ide and music by Masaru Yokoyama.

Plot
A group of 30 young men and women go on a bus tour to Nanakimura, a shadowy village with an urban legend of being a utopia. Upon arrival, they discover the village has no inhabitants, with small signs of life that are slowly deteriorating. The truth of Nanakimura has yet to be discovered.

Official
Mayoiga Offical Website