Is Return of the Demonic Instructor Worth Reading? Review & Where to Read

Quick facts
Format	Manhwa, 60 chapters
Run	2025–present · ongoing
Community score	AniList 6.1 · MangaUpdates 6.4
Where to read	WEBTOON — official

Overview

Bigang Sa watched his world fall to a demon invasion and spent centuries afterward forced to fight in the very army that conquered it. When a human uprising finally fails, he's thrown back 10 years before the invasion ever began — with a rare advantage nobody else in this timeline has: firsthand knowledge of exactly how the demons fight, because he was one of their soldiers.

What it does well

The smartest choice here is what kind of knowledge Bigang actually brings back. Rather than personal martial arts mastery earned through years of solo training, his advantage is tactical and strategic — he knows the demon army's methods, weaknesses, and battle patterns because he lived inside that machine for centuries. That reframes the usual murim regression setup as something closer to a counter-insurgency plan than a simple power fantasy, and it justifies the story's decision to center training and mentorship rather than one lead simply getting stronger alone.

Building the narrative around Bigang shaping a new generation of murim fighters gives the story a broader cast to invest in than a typical solo-regression tale, and with over 60 chapters to work with, there's been real room to develop that mentor dynamic rather than rushing through it. The looming demon invasion also gives every training arc a concrete deadline and stakes, which keeps the pacing purposeful even during quieter chapters.

Where it falls short

Strip away the instructor angle, and the broader shape — a survivor sent back in time to prevent an apocalypse he's already lived through — is still very familiar murim and action-regression territory, and readers who've read a lot of similar series will recognize the beats. Because Bigang spends a meaningful amount of the story training rather than fighting himself, some of the biggest action sequences center on his students instead of him, which is a deliberate structural choice but one that won't appeal to readers who specifically want their regression lead as the story's primary combatant throughout. The wider cast of students, while growing, is also still being differentiated from each other this far into the story.

Verdict

Return of the Demonic Instructor takes the murim regression formula and gives it real distinction by making its lead's advantage strategic rather than purely physical, building a mentor-and-students structure that broadens the story's stakes. It's recognizable genre territory at its core, but the instructor framing makes it a worthwhile pick for readers who want something a little different from the format.