Madam, You Are the Demon King Behind the Scenes

Luo Zian traveled through time and became a minor civil servant in the Qintian Prison. He only wanted to fish and maintain his health, and also to find out about his beautiful wife who had "something wrong". She is gentle and considerate, but fragile, but she always goes out late at night, with a vaguely evil aura about her. Luo Zian relied on his knowledge from his previous life to solve crimes and was promoted, and he prospered in Qintian Prison, but secretly he and his wife acted out a "couple's mission impossible". He thought he was on the fifth floor and his wife was on the third floor. Until one day, his weak wife took a step forward, her eyes were cold, and all the monsters bowed their heads. Luo Zian suddenly realized "Madam, you are actually... The demon emperor behind the scenes?!"