Some anime is aimed at children and teens for the most part, with shows like Dragon Ball Z, Sailor Moon, and Inuyasha. Some people don’t realize is that anime has a huge adult-aimed repertoire too.
Made in Abyss, a show about children going down a labyrinth of tunnels, has both anime and manga (the comics counter-part of anime).
They claim that they don’t mean to imply that we can’t or even shouldn’t enjoy Made in Abyss, but they give us a fair warning before we bury our face in the manga or start watching the show itself.