If you're looking for anime similar to Grotesque Baths - Part 2, you might like these titles.
Kou Outori a normal high school student who experiences a repeating dream of being eaten by a beast from inside himself. When Kō meets Reiichi Kuki, the elite student who rules his school, the encounter awakens hidden powers inside him.
A man posts his dissatisfaction with everyday life on social media. He gets lost in GeGeGe Forest.