Reima Kariya, a summoner who saved another world but was executed because his immense power was deemed a threat, wakes up to find himself back in Japan—the same world he originally came from. However, this Japan is slightly different, as it is now overflowing with dungeons, and the profession of “dungeon streamers” has become highly popular.
Wishing to live a peaceful life in the Japan he has returned to, Reima decides to conceal his powers and blend into this altered modern world…
