Survive family vacation, save the world. 

He's a spy. She's an assassin. Together, Loid and Yor keep their double lives to themselves while pretending to be the perfect family. However, their adopted daughter Anya, a telepath, knows both of their exciting secrets unbeknownst to them. While under the guise of taking his family on a weekend winter getaway, Loid's attempt to make progress on his current mission Operation Strix proves difficult when Anya mistakenly gets involved and triggers events that threaten world peace! 
(Source: Crunchyroll, edited)