Kamiyashiro: Jikosatsu no Kei

Kei is a young man whose life is shattered when his cherished younger sister is brutally murdered by an enigmatic new religious organization. Consumed by grief and a singular desire for retribution, he dedicates himself to mastering a specialized and deadly art form designed specifically for vengeance. Rather than relying on brute force or overt violence, Kei cultivates an expert-level skill set focused on engineering fatalities that appear entirely natural or unintentional to outside observers. This sophisticated methodology, known as "Accidental Murder," allows him to eliminate his targets without leaving evidence of foul play or attracting legal suspicion. With his technique perfected, Kei initiates a calculated campaign against the cult responsible for his sister's death. The narrative follows his meticulous execution of revenge, transforming each assassination into a seamless tragedy that masks his true intent while delivering justice through seemingly unavoidable accidents.