Shin Ki-hwan

Made half-human and half-spirit by accident, a young man is employed by a company of grim reapers in the underworld to carry out special missions.

While living with a few other young men in his mother's boardinghouse, Sul-won navigates new responsibilities — and unexpected romance.

After his mother's death, 16-year-old Hyung-ju suspects that his father is not his biological father. A secret paternity test reveals that he is not. Confused, he uses his math skills to figure out his biological father and embarks on a journey with his best friend, Ji-su, to find him.