Keisuke

Sharing a powerful bond with his older brother, Keiji, this formidable half-brother possesses a level of strength that rivals his sibling's prowess. Driven by a sense of duty and familial loyalty, he embarks on a perilous journey alongside Keiji to navigate a world plagued by monsters. Their shared mission is fueled by the urgent need to track down and rescue their father, who has fallen victim to a sudden demon abduction.