Gakkougurashi!, Made in Abyss Recommendations
Both involve cute kids going on adventures
Both involve said cute kids in their own group (Red Whistles and the School Live Club)
Both give off an uneasy feeling that something dark is lurking around the corner
Both include great OPs
Both shows involve cute looking characters getting themselves into scary situations. Both shows also get dark really fast.
*Both have children passing by difficulties
*Both have fake cuteness
*Both have a dark atmosphere
It has a great soundtrack whilst giving a cutesy look, but the world is cruel and dark.