I mean the author is definitely working through some traumas in the series. Kids as a whole dealing with very adult shit is like the whole fucking purpose of the anime. Not saying there isn’t some questionable shit in there, but I also feel like it fits naturally given the context mentioned above 🤷♂️
I completely agree, the sexualization of kids is insane but you have to admit it fits perfectly within the parameters of the show. While I do believe he goes a bit too in depth sometimes they are his characters and as an artist he can actually… like literally do whatever he wants with them.