After experiencing a distressing incident, the lead character named Wataru sets out on a quest to reach the realm of Soukaizan. However, there is a sense of uneasiness lingering in the atmosphere and Wataru's formidable partner, Ryuujinmaru, is constrained in its abilities. Undaunted, Wataru embarks on a new adventure along with his associates Shibaraku, Toraou and Himiko.