Everyone has a side that they cannot tell others. This is an era when all countries in the world are secretly engaged in fierce intelligence wars. The cold war between Ostania and Westalis has lasted for decades. "Dusk" is an excellent spy in the East Countermeasures Section "WISE" of the Westalis Intelligence Agency. In order to investigate the person who threatens the peace between the East and the West - Donovan Desmond, the president of the East National Unity Party, his superiors gave him a top-secret mission. The mission is called "Strix". The content is "to form a family within a week and sneak into the fraternity of the prestigious school where Desmond's son attends." So "Dusk" pretends to be a psychiatrist Lloyd Folger and starts to form a family. However, his daughter Ania is a superpower who can read minds, and his wife Joel is a killer. The three have the same interests, so they hide their identities from each other and start living together. The peace of the world is in the hands of this temporary family with constant accidents.