This is actually incredible. It's an adult seinen fantasy about setting traps! Artwork is great. It's fast paced with zero filler. All the characters are likeable. MC is smart but not overpowered. There's tons of fanservice but without any boring "harem drama" dragging the story down. It's refreshing getting a manga that's absolutely brutal but remains fun throughout the entire series. It's too bad it's only 4 volumes but they do tell a complete story which is great. Really don't have a single negative thing to say about it. Highly recommended to anyone who is tired of boring kid friendly isekai.