>>3761922Texhnolyze is "really makes you think", the anime. Without spoiling too much, cyclical history and societal decay are very very central to the shows plot. The final episodes were absolutely stunning.
Monster is just a damn good show set in 80s germany, but its filled with a lot of heart and great characters, and "its never too late to change" being one of its central themes always lifted my spirits. You should watch it because its good first and foremost though.
These two are one of the few anime I'd unironically call "mature"
