Kariya Reima, a summoner who saved another world, was executed after his powers were deemed dangerous. When he next opened his eyes, he found himself in Japan, his original world—yet it was a slightly altered modern Japan, one where dungeons abounded and the profession of "dungeon streamer" was highly popular.

Reima, having returned from another world, wished for a peaceful life in Japan and decided to conceal his powers and live quietly, but...

Also posted on Kakuyomu, where updates are faster.

https://kakuyomu.jp/works/16818093085143277629

Title changed due to book publication.

[Previous Title] To Another World Summoner Dungeons ~Regarding My Summoned Beasts Being Undeniably Overpowered After Returning to Modern Day~