Upon arrival, Akira spends his first 30 minutes designing a "comfortable" dungeon, only to realize he has built a "zero-defense" trap for himself. The Conflict:

Manga Geki Tsumi Dungeon desu ga, Sukiru Hanshoku de Gyakuten shitai to Omoimasu (It’s a Dungeon of Sin and Crime, but I Think I Want to Turn the Tables with the “Breeding” Skill)

In a desperate attempt to survive, he uses his unique "Hanshoku" (Breeding) skill. Rather than choosing a conventionally powerful monster for protection, he initially chooses a bunny girl for a "last moment" before his expected death.