Who This Book Is For
Readers who enjoy methodical dungeon-grinding isekai with slow-burn harem building and do not mind familiar premises
Who This Book Is NOT For
Anyone who has read or watched Harem in the Labyrinth of Another World and expects original world-building
Our Review
The Setup
Matthew Cole has nothing — no future, no ambition, no reason to wake up tomorrow. Then a mysterious website offers him a character creation screen with no limits. He stacks every broken ability he can find: a holy sword that steals life with every hit, experience gains multiplied a hundredfold, a 30% discount on everything he will ever buy, and a teleportation spell that ignores walls. The catch is that he wakes up in a medieval world where dungeons produce civilization’s resources, monsters drop the cooking spices, and slavery is as common as bartering. If anyone discovers his abilities, the empire will execute him for having the founding emperor’s job class.
Alone, broke, and trying not to die, Matthew grinds the dungeon, learns the economy, and saves every copper coin toward the one purchase that changes everything: a wolf-girl with golden ears who can dodge any attack by a hair’s width, who calls him Master, and who might be the first person in either world who actually needs him.
What Works
The progression system is the strongest element here. Whitney builds a dungeon economy that feels internally consistent — resources have value, levels matter mechanically, and the stacked abilities create satisfying power curves without removing all tension. The 787-page length means the world-building gets room to develop at a pace that rewards patient readers rather than rushing to action set pieces.
The dynamic between Matthew and his wolf-girl companion is where the emotional weight lives. The slow burn is genuinely slow — this is not a book that rushes to intimate scenes — and the relationship development benefits from the restraint. For readers who prefer their harem fiction to earn its connections rather than speedrun them, the pacing works.
What Doesn’t
The elephant in the room is the similarity to Shachi Sogano’s Harem in the Labyrinth of Another World. Multiple Amazon reviewers have pointed this out in detail, noting near-identical character classes, dungeon structures, and even the same name for the wolf-girl companion. Some readers found the overlap so extensive that they described it as a copy with a new coat of paint. Others acknowledged the inspiration but felt the book diverges enough to stand on its own. Where you land on that spectrum will likely determine whether you enjoy the book.
The MC’s characterization also drew criticism. At 18, Matthew is positioned as a college dropout with no ambitions, and several reviewers found him too passive and unreflective to carry an 800-page novel. The repetitive internal reminders about his background pad the page count without adding depth.
The Heat
This sits at a 2 on the spice scale. The book takes a deliberately slow approach to intimate content, and for much of its length, the focus is squarely on dungeon mechanics and economic progression. When moments of closeness arrive, they are understated rather than explicit. Readers looking for high heat should know this is a progression-first book.
Bottom Line
The Broken Build is a competent dungeon-grinding isekai that delivers on its LitRPG mechanics and offers genuine page-count value. The slow-burn harem approach will appeal to readers who prefer earned relationships. But the similarity to an existing well-known series is a significant hurdle that has already polarized its audience. If you have never encountered the source material, you may find a solid first entry in a four-book series. If you have, your mileage will vary considerably.
Keep Reading
- More isekai harem books reviewed
- Best harem books of 2026 — ranked by our editors
- All harem books on Kindle Unlimited
If You Liked This, Try
The book openly draws from the same premise — dungeon grinding, slave purchase, medieval isekai economy
Nearly identical setup with character creation, dungeon mechanics, and wolf-girl companion
The Verdict
The Broken Build delivers a hefty 787-page isekai with solid dungeon mechanics and a slow-burn approach. However, the heavy similarity to Harem in the Labyrinth of Another World is impossible to ignore and has divided readers sharply. If you can look past the familiar framework, the progression system is engaging. If originality matters to you, this one will frustrate.