By volume 3, he names his creatures, mourns their losses, and refuses to use certain breeding methods (e.g., forced mutation). The dungeon becomes a twisted moral testing ground. The setting is not random — it’s a sentient dungeon designed to punish hubris.
So how does our hero plan to survive? Not by swinging a bigger sword, but by using a seemingly non-combat skill: — often translated as Breeding , Propagation , or Multiplication . By volume 3, he names his creatures, mourns
This flips the usual isekai power fantasy on its head. The protagonist wins not through overwhelming individual strength, but through ecosystem engineering . Kaito is a refreshing protagonist because he remains human — vulnerable, terrified, but relentlessly analytical. So how does our hero plan to survive
He realizes: the dungeon’s own traps can be bred. From that point on, Kaito doesn’t fight traps — he harvests them. drop your recommendations.
At first glance, the premise sounds like a suicidal mission. The protagonist is thrown into a dungeon so unforgiving that veteran adventurers call it the "Geki Tsumi Labyrinth" — a place where every corridor hides a guillotine, every chest is a mimic, and the air itself can be poisoned. Standard brute force or magic spells get you killed by floor three.
Introduction: When a Death Trap Becomes a Nursery In the crowded world of isekai and dungeon-crawling manga, a new title has been generating quiet but fervent buzz among fans of strategic reverse-harem and monster-taming genres: "Manga geki tsumi dungeon desu ga sukiru hanshoku de gyakuten shitai to omoimasu" (roughly, “It’s a Dungeon Full of Deadly Traps, But I Want to Reverse the Situation Using the Breeding/Multiplication Skill” ).
Have you read this manga? Share your thoughts on the breeding mechanics in the comments below. And if you know other “weak skill but genius use” titles, drop your recommendations.