Naked Fireman(2017)

Original title: 맨몸의 소방관

Kang Chul Soo is an enthusiastic fireman. He poses as a nude model to make money for his sick friend. He is then targeted as the criminal of an arson-murder case that took place 10 years. Kang Chul Soo and mysterious heiress Han Jin Ah try to find the real culprit.