What the Heck Is Dark Trigger?!

[Slow burn, character growth, radically altered worldbuilding, protagonist is Trigger]

I transmigrated into the world of Trigger, but something about it seemed off.

The sunny and cheerful Kengo Manaka had become an insecure guy who doted on his younger brother.

Yuna Shizuma, who used to goof around with Kengo Manaka, had become a genius scientist who kept muttering, "Urusai."

Ryuichi Tokioka, a villain who should only have appeared in the movie, nearly died of exhaustion while fighting monsters.

Ultraman Decker had shown up more than a decade early, but his human host was the old man who sold pancakes in Kanata Asumi's shop. What was that about?

Even Tesshin Sakuma and Aoi Nanase, those two patients from the mental hospital, were acting strangely.

The transmigrator Yuresa was exhausted.