Bostov is one of eight warriors secretly blessed by the goddess Windina to combat the resurgent evil deity threatening Villgust. He belongs to a distinct quartet of champions alongside Murobo, Remi, and Ryuquir. This group operates separately from another team of four warriors: Kui, Chris, Fanna, and Youta. Bostov's group must unite with the other four warriors before they can fully embark on their destined path to confront and defeat the malevolent deity.