[Machine Translation] The demon king loses his job due to the closure of the fast food restaurant where he works part-time. He also has to temporarily move out of his apartment, Villa Rosa Sasazuka, in order to repair a wall that was damaged in the battle with Gabriel. The Demon King, who has lost his job and the Demon King's Castle at the same time, decides to work at a "beach house" on the advice of his landlord, Shiwa. It seems that the restaurant is run by a woman named Tenno, who claims to be Shiwa's niece. Furthermore, a high school girl, Chiho, who is in love with the Demon King, and even a hero, Emilia, who is after the Demon King's life, come to the beach house in pursuit of him...? It's summer, and even at the beach, it's work! This is the fourth installment of this popular fantasy.