The Kingdom of "Tomru," where dragons have been rampant since ancient times and the existence of "Dragon Slayers" is indispensable. In its remote "Rosenfield District," a Soapland that Japan is proud of has set up shop—its name is "Kaguya"! "Another World" and "Soapland" have been connected! Day and night, battles between the renowned heroic "Dragon Hunters" and the "Bubble Princesses" are unfolding! Anzu, a popular Bubble Princess of "Kaguya," opens a forbidden door and ends up in another world! Suddenly attacked by a dragon, she is saved by the apprentice hero, Cook. Aiming for "Kaguya," which is rumored among the people to be the "Legendary Paradise where true heroes gather" ──── their great adventure has begun!!!