Takarasagashi no Natsuyasumi
English title: The Summer Vacation Treasure Hunt
Japanese title: たからさがしのなつやすみ
Type: ONA
Source: Original
Status: Currently Airing
Aired: Feb 1, 2014 to ?
Duration: 49 min
Rating: Rx - Hentai
Producers: SANDWICHWORKS
Genres: Hentai

The story takes place in rural Japan, during an idyllic summer. The innocence of youth... informed by a depraved modern world.

(Source: AniDB, edited)