Kautz, a young man who works at an adult armor shop, was collecting materials for armor along with the owner Naden, the signboard girl Lillietta, the regular customer Flaarica, and the Demon King. With the powerful magic of the Demon King, the party who gathered the materials effortlessly encounters the armor falling from the sky on their way home. What was the sight you saw there ...? Travel adventurers. Welcome to the adult armor shop.