特殊工作員の怜司は潜入した敵アジトで一人の少女ニーナを救出する。ニーナは「ドール」と呼ばれる暗殺者だった。ニーナを監視下に置くため、機関は怜司に一緒に住むよう命じる。子育てなど無縁だった怜司が、いきなり少女のパパに!? 標的と暗殺者によるハードボイルド育児コメディー!!
Reiji Takahashi is a secret agent of the Interior Ministry who found a little girl during a mission. The girl Nina was trained by the mafia to be a cold-blooded killing machine. Now Reiji has been ordered to watch over Nina, and he better watch his back, too, because Nina is still out to get him! A hard-boiled child-care comedy remake from a popular SNS work.