Available on platforms like ABEMA for Japanese viewers.

Published by Futabasha under the Monster Bunko imprint.

Illustrated by Arashiyama and serialized on Web Comic Action .

The story follows , a former hero who successfully saved the world of Eclair. After being betrayed and forcibly sent back to Earth as a baby with his memories intact, he grows up as a "gloomy" high schooler only to be summoned back to Eclair once more—this time alongside his entire class. Original Work: Light novel series by Kazuha Kishimoto.

In the manga progression, chapter 23.2 typically falls within the "Beastman Continent" or "Demon Continent" arcs, where Setsu reunites with former allies who have aged or changed in the five years since his first disappearance.

Official Japanese chapters can be found on Gaugau Monster.

( Isekai Shōkan wa Nidome Desu ) is a popular isekai series that subverts standard tropes by starting the story after the hero has already saved the world. Series Overview