(Etsuran Chuui) Haison ni Douga Satsuei ni Ittara Oji Shota (?) Osananajimi to "Nanika" ni Torawarete Shimatta.

"A small village deep in the mountains... Ten years ago, this village… suddenly vanished, along with every single villager... Hikari, an ordinary college girl, recently remembered her childhood hometown out of the blue, without any warning. A small, insignificant abandoned village she could only recall through hazy memories… Just then, some streamers from her university ask Hikari to go to the village with them. “We’re thinking of doing an ‘abandoned village’ project!” Unable to say no, Hikari agrees to tag along as a camerawoman... (Source: dlsite)"