Spy x Family Vol 1

Spy x Family by Tatsuya Endo. A Shonen manga rated Teen, published in English by Viz Media.

Master spy Twilight's newest mission requires him to build a fake family. He adopts Anya, a little girl who secretly reads minds, and marries Yor, a gentle office worker who is secretly an assassin. None of them know the others' secrets, and keeping the family together is the hardest mission yet.