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
Made in Abyss and School-Live! Are similar with masking the darkness of the true anime. It starts off with a cute anime style making you think it's just another moe anime with nothing going for it except for cute characters, but soon the true soon gets revealed.