Sudachi no Maoujouすだちの魔王城; Sudachi's Demon Castle; The Fledgling Demon Lord's Starter Shop; 홀로서기 마왕성; 啟程的魔王城; Sudachi - The Demon King Incident; ตำหนักจอมมาร ร้านซึดาจิ; Lâu Đài Ma Vương Sudachi

The hero defeated the Demon King and the world became peaceful-despite the fact that the boy in Saisho village, Murabito, was in trouble. Because it's too peaceful for his tool shop to have any customers! If nothing is done, the store will be closed ... What is the identity of the girl who appeared at that time ...!?