Is The Guy Upstairs Worth Reading? Review & Where to Read

Quick facts
Format	Webtoon (josei), 55 chapters
Run	on hiatus
Community score	MangaUpdates 6.7
Content	Violence, stalking, mature themes
Where to read	WEBTOON — official

Overview

Rozy is a college student who's noticed something off about the man who lives in the apartment above hers — odd noises, odder hours, a general sense that something's not right. The Guy Upstairs starts as exactly that kind of low-key paranoia thriller, then turns a corner fast once Rozy gets proof that her neighbor Adam is far more dangerous than "a little weird." From there it's a story about what she does with that knowledge, and how much danger she puts herself in trying to expose him without anyone believing her.

Hanza builds this on a premise that's been done before — the killer next door — but keeps it grounded instead of leaning into slasher-movie theatrics. No supernatural twist, no over-the-top set pieces. Just two people who live too close to each other, one of whom is hiding something the other one can't unsee.

What it does well

The strongest thing here is Adam himself. He's not written as obviously monstrous — he's quiet, capable of normal conversation, easy to dismiss as harmless if you didn't already know better. That's what makes the chapters where Rozy has to interact with him genuinely tense: the reader knows what she knows, and every ordinary exchange between them carries weight it shouldn't.

Rozy holds up her end, too. She's not a horror-movie protagonist making baffling decisions to keep the plot moving. She's cautious, she gathers evidence, she brings in help when she can get it, and her fear reads as earned rather than performed. The early stretch of the series is especially well-paced — small, unsettling details accumulate before the story tips its hand, so the dread has time to build properly instead of being announced.

The art supports all of this well. Hanza isn't afraid to let a scene sit in silence, using stillness and empty space instead of loud paneling to sell tension, which fits a story about a threat that's dangerous precisely because it doesn't look like one.

Where it falls short

The cast outside Rozy and Adam thins out fast. The detective helping with the investigation and Rozy's friends exist mostly to move information along rather than as people with their own weight, which is a missed opportunity in a story this focused on isolation and who you can trust. A handful of plot turns also rely on Adam slipping up in ways that feel more convenient than consistent with how careful he's shown to be earlier in the story — useful for keeping the chase going, less convincing on a re-read.

The bigger issue for anyone starting today is simply timing: the series has been on indefinite hiatus, and there's no confirmed date for it to pick back up. That's not a knock on the story itself, but it's a real factor if you're the kind of reader who wants to see a thriller through to its ending.

Verdict

The Guy Upstairs earns its tension through restraint — a believably dangerous antagonist, a protagonist who acts like a real person, and pacing that trusts small details over big scares. It's one of the better grounded thrillers on WEBTOON when it's actually updating. Just go in knowing you'll likely hit the hiatus wall before you hit an ending.