Takumi Iruma is summoned to another world by chance. Since the goddess Nolyn cannot bring him back to his world, he is supposed to live in her fantasy world Mildgard. There, Takumi immediately saves a young girl and is taken to her village.

Maple, the spider monster that Takumi meets in the forest and Tames, possesses the Skill to create Spider Silk, an extreme luxury good! The silk becomes a hit amongst the villagers, and they welcome Takumi and his unique Skills as he grows accustomed to life in the village.

In order to create 100 of the toilets equipped with a magic device that Papek begged him for, Takumi visits the Mulan Company to procure help. After requesting "someone to the manage the mansion" and "someone capable of fighting and protecting me", Takumi meets a beautiful human girl, Maria, and a beautiful elf, Sofia.