Kasouken no Onna Season 22

The Forensic Science Laboratory receives a report that a man has burned to death in a park. Sakaki Mariko rushes to the scene, where Kyoto police detective Domon Kaoru tells her a startling revelation. According to witnesses, the victim was walking and talking on his smartphone, but the moment he sat down on a bench, fire erupted from his body. Moreover, the fire continued to burn without the slightest movement. Mariko and her colleagues could not hide their confusion as to how on earth such a situation had occurred since there was no fire in the surrounding area…
(Source: Drama-Otaku)