Shinsekai yori, Sakurada Reset Recommendations
Both shows feature a group of young people living in a seemingly peaceful society. Eventually, they discover some secrets about their society, and the main characters are involved in a major conspiracy movement that may or may not change their lives forever.
large amounts of exposition, generally calm, occasional blood-splattering, exploration of philosophical ideas, superpowers controlled by an organization, complex plot that gradually all comes together
Both show's initial episodes serve to build the world and characters, and can only be fully appreciated after watching later episodes. The overall vibe and feel are also similar for both shows.