Is Bug Ego Worth Reading? Review & Where to Read

Quick facts
Format	Manga (shōnen), 3 volumes
Run	2023–present · ongoing
Community score	AniList 7.4 · MangaUpdates 7.1
Content	Psychological horror, body horror, disturbing imagery
Where to read	VIZ / Shonen Jump — official

Overview

Takehiro Kokudo is socially awkward and easy to overlook. Makoto Hitsujia is neither of those things, and when the two of them stumble onto a notebook describing "bugs" - specific, rule-bound actions that warp reality if performed exactly right - Hitsujia drags a reluctant Kokudo into testing them out. The catch, and the whole engine of the series, is that a bug followed to the letter does something extraordinary. A bug followed almost correctly does something much worse.

What it does well

Bug Ego's best idea is treating its reality-glitches like a horror version of a rulebook, and letting precision - not monsters or gore - be the source of dread. Every bug comes with exact conditions, and the tension isn't "will something scary happen" but "did they follow the instructions closely enough," which turns the reading experience into something closer to watching someone defuse a bomb than watching a typical horror story unfold. It's a smart structural trick, and it keeps the horror feeling controlled and intentional rather than random.

The two leads carry that structure well. Kokudo's caution against Hitsujia's willingness to push past the rules "just to see" gives the story a recognizable human dynamic underneath the reality-bending premise, and later addition Hashira Yuki - an overworked, competent classmate chasing some sense of lost joy - adds another angle on why anyone would keep testing something this dangerous. The art matches the concept's clarity: reality-breaking effects are drawn with enough precision that you always understand exactly what's gone wrong, which makes the horror land instead of just confusing you.

For readers who know ONE only from One-Punch Man's comedic power fantasy or Mob Psycho 100's blend of comedy and heart, Bug Ego is a genuine showcase of range. The dry humor is still recognizably his, but here it's in service of unease instead of gags.

Where it falls short

As an ongoing series still finding its long-term shape, some early chapters read more like standalone proof-of-concept episodes for the bug mechanic than pieces of one connected story - the throughline is there, but it's still tightening up. The bug system itself occasionally needs characters to make choices that serve the horror more than their established personalities, which can feel like the premise steering the cast rather than the other way around.

It's also, by design, a slower read than ONE's other work. If you're coming in expecting the constant forward momentum of One-Punch Man, the more patient, dread-building pace of horror serialization takes some recalibration.

Verdict

Bug Ego is a genuinely smart, unsettling horror manga that gets its scares from precision and consequence rather than shock value, and it's an impressive pivot for a creator best known for punchlines and power fantasy. If reality-bending horror with real rules behind it sounds appealing - and especially if you're curious what ONE can do outside his comfort zone - this is well worth following.