Two contract killers accidentally acquire a four-year-old and the series treats both halves of that premise with equal seriousness, so the parenting is as well-observed as the action is well-animated.
What the story actually is
Kazuki Kurusu and Rei Suwa are professional assassins sharing an apartment and a working partnership. On a job that goes wrong, they encounter Miri Unasaka, a small girl who has come to the building looking for the father she has never met, who happens to be their target.
They end up keeping her. The series alternates between contract work and the logistics of raising a child neither of them is equipped for: nursery admission, medical records, allergies, birthdays, and the fact that neither has a legal identity that survives paperwork.
The parenting material is the good part
The show is specific about childcare in a way that comedies with this premise usually are not. Miri behaves like an actual four-year-old rather than a plot device, with real inconsistency, tantrums, obsessions and misunderstandings, and the writing gives her an inner life.
Kazuki's backstory reframes his eagerness to parent, and the series handles that reveal without turning it into a twist. P.A. Works keeps the domestic sequences warm and detailed, and the apartment gradually becomes visibly child-occupied across the run.
The action holds up
This is not a comedy that gestures at its action premise. The assassination sequences are properly choreographed, Rei's sniper work is treated with technical care, and the back half escalates into genuine consequence rather than resetting each week.
The tonal management is the impressive part. The series moves between a nursery pickup and a gunfight without either register undercutting the other, which is a harder trick than it looks.
Who should watch it
Watch it if you want found family with real emotional stakes, competent action, or a show that commits to both its genres. It is an original series, so the story is built for twelve episodes rather than cut from something longer.
Skip it if the tonal mix sounds unstable to you, or if you want the action to dominate. The domestic material is the larger share of the runtime and it is where the show invests.
