In the dragon-infested kingdom of Tomul, where hunters known as dragon slayers are essential for survival, a Japanese soapland called Kaguya has somehow become connected to this fantasy world. The establishment operates in the remote Rosenfeld district, and its most popular attendant, a lively and spirited girl named Anzu, accidentally opens a forbidden door and is transported into the wider world beyond Kaguya. She is immediately attacked by a dragon but rescued by a young apprentice hero named Cook. The common people whisper of Kaguya as a legendary paradise where true heroes gather, and Cook decides to seek it out. Anzu and Cook join forces and set off on a journey across Tomul, aiming to reach the rumored establishment. Along the way, they encounter a mysterious young woman who knows Cook's missing father, Jake, adding a personal layer to the quest. Later, the adventure leads them to the casino town of Vaade-Garden, where they face off against a bunny-girl gambler named Chuchu, a playful and eccentric antagonist who challenges Anzu in a bizarre contest.