Land of Monsters Manga Ends in 3 Chapters
Series launched on February 5
Viz publishes the series in English and describes the story:
Mitsutani launched the manga in Shogakukan's Weekly Shonen Sunday magazine on February 5. This is the 20-year-old creator's first manga series. Shogakukan shipped the second compiled book volume on August 18.
Source: Weekly Shonen Sunday issue 44