Find Immortals, Collect Immortal Grass, and Practice Elixirs

As the earth's resources become increasingly scarce, Aerospace technology has hit a bottleneck. Major financial groups are preparing to organize an exploration of ancient legendary places. I hope to find the technology of prehistoric civilization, ... So the global live broadcast program Secret Adventure came into being, The protagonist got an adventure during this adventure, so he started to find immortals, collect immortals*, and practice elixirs! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.