tl;dr: A manga with an amusing start but that doesn’t really advance enough to stay interesting. This is a manga about a heroine, Zeno, that goes to defeat the demon lord, Grull, but comes back without killing him when she discovers that he’s a baby only a year old, and is then tasked with raising the demon lord to be a proper adult with the punishment for failure being her death. However, despite being tiny and only a year old, Grull acts more like a kid around age ten, and an incredibly selfish and perverted one to boot, which makes her task quite difficult and annoying.It doesn’t help that Zeno herself is quite naïve and gullible so she’s constantly being pulled into various misfortunes. The task Grull must complete before it’ll be judged that he’s grown into a proper adult is him helping a million people, so they take on various tasks in order to do so. Over the course of this, they meet various characters, human and demon. Of those, two even join their party, the chuuni mage Lilia who comes to look up to Zeno, and the yandere vampire Ruby, who is completely obsessed with Grull.

I found this premise to be pretty interesting. Although it did have the potential to have a plot that dealt with more serious matters it never attempted doing so, so the manga itself is entirely centered around comedy. And this comedy starts out pretty decent. It’s carried heavily by the four main character’s being pretty amusing. Sure, Lilia feels like a knockoff of Megumin from Konosuba and Ruby feels like a knockoff of Albedo from Overlord, but it twists them enough and puts them in a new enough context that in combination with everything else the humor starts off working decently well, and that’s enough to hold up the manga for the first half or so.

As it goes on though things don’t really advance much and it begins to feel like things are dragging on. The comedy is very narrow and thus starts getting more and more repetitive as the manga goes on, and the manga isn’t able to make up for that in other areas. The characters were interesting to start off, but they aren’t fleshed out beyond that, nor is there really any proper character or relationship development. In the last quarter of the manga it tries to force things by pushing the plot along in such a way that it makes it feel like character and relationship development has occurred, but it doesn’t really feel deserved. The plot similarly has events that occur in the last quarter or so that progress things, but they’re just kind of abrupt and thus hard to really get into. As such, the ending overall falls pretty flat.

The art was a mixed bag. The quality is decent and the character designs and general style and are solid enough for comedy, even if they’re somewhat generic. The problem is that the manga also spends a lot of time trying to be ecchi but the art and writing just aren’t very good at that most of the time.