Treasure Hunter Mai v2018-10-23 by Doujin Circle Gyu

She found the old map at a used book store. A map to a legendary treasure hidden by the great treasure hunter Leonard Puwall... in an entirely different dimension. Perky hunter Mai Takarada, her friend Kenichi, and Kenichi's tagalong pal Takuya go to this alternate dimension and into a limestone cave. But they're not the only ones looking for the treasure...​