Nina Is Plotting Daddy's Death

Reiji Takahashi is a Special Operations Agent. While in the middle of sweeping through a criminal group's warehouse, he finds Nina, a victim of a trafficking ring dealing in child assassins named "Dolls." One thing led to another, and he ends up being assigned with caring for the young assassin (Who, coincidentally, is aiming for his life). Can Reiji, a man with absolutely zero experience with children, become a proper father to this tiny assassin and teach her how to lead a normal life? Find out in this heartwarming childcare comedy between a "hard-boiled" operative and his adoptive(?) daughter! (Source: Square Enix)

Nina wa Papa wo Ansatsu Shitai is based on the web manga Hikitotta Musume ga Ansatsusha datta (引き取った娘が暗殺者だった), released on the author's Twitter and pixiv accounts from April 26, 2019, to May 9, 2020. The series has been published digitally in English as Nina is Plotting Daddy's Death by Square Enix through Manga UP! and through Comikey since September 30, 2023.