The Diary of a Crazed Family S01 E01 Kyouka-sama, Reigning

Ouka stumbles upon a "young girl" stealing an apple one day, per chance, to find himself part of the "Cozy Family Operation" - a top secret mission, in which he has to take the place of father for an abnormal family, in order to find the child of Enka, who is destined to destroy the world.