Spy X Family, Vol. 2 by Shūsaku Endō

A master spy struggles to maintain his cover as a family man when his telepathic ward starts at an elite academy, immediately clashing with the arrogant son of his target and earning a demerit for decking him. To salvage the operation, he micromanages her attempts to apologize and forge a friendship, while their deceptively demure, lethally skilled homemaker provides fierce protection and unconventional training after a run-in with kidnappers. Amid comedic chaos and close calls, the trio strive to keep their secrets while inching closer to high-society access.