I'd say there are two things this manga is built upon: adventuring and adorability.
As for the adventuring, it's not very interesting. For one thing, every quest and challenge is overcome far too easily. For another, the plot-beats feel like that of tons of other isekai stories: A normal Japanese person is dropped into a dangerous forest in another world, makes feir way to town, joins the adventurer guild which uses a ranking system and a notice board for quests, displays strength by overpowering bullies and other feats like labyrinth exploration, is relied upon by the guild and townspeople and is personally requested for difficult quests often despite a low rank, deals with corrupt nobles, and travels to new towns to probably repeat the cycle all over again.
As for the adorability, initially the two children accompanying Takumi do look adorable. But over time, the lack of variety in their facial expressions and emotions gets tiresome and even annoying. They kinda just constantly stare up at Takumi with wide eyes and pinpoint mouths. They beam and jump with happiness at having defeated some monster or otherwise accomplished a goal. Fe pats their heads and praises them. I suppose this aspect of the manga does provide a more distinct lifestyle goal from many isekai manga, what with Takumi aiming to properly care for these children. And Takumi often doesn't even participate in fighting monsters, since the kids see it as a fun game (like Takumi, the kids also have cheat-level strength).
Most of the artwork is okay, with only the cutesy faces of the children really standing out. And as I mentioned previously, I eventually grew tired of that. I don't like the clothes that Syl materialized for the kids--they look dumb. The monsters and other animals are often drawn anatomically off. The author seems to have especial difficulty drawing snouts.
None of the characters resonate with me. They just feel hollow. And Luna and Syl both actively annoy me.
[Reviewed at chapter 17]