The Secret S01 E04 The Serpent That Calls Misfortune

"A shocking work that depicts the extreme love-hate between a man and a woman with a strong touch of suspense on the theme of marriage."

An incident occurs in Kanako (Chikako Kaku)'s apartment where a fire extinguisher is lost, and it is rumored that the culprit is Shingo (Yuichi Haba). Kanako, who is in distress, is rescued by Mario (Shiro Sano).