Mahoutsukai no Yome, Houseki no Kuni Recommendations
a fantasy world that is mysterious at first. but you learn more about the characters as the story unfolds. it deals with a lot of serious and dark themes such as the meaning of life mortality, what gives us meaning, sacrifice, death, trust and so on. its the type of show you can watch multiple times and you can still learn something new, now that you have knowledge of some things you did not before. the story only gets better and better. also the animation <3
Mahoutsukai no Yome and Houseki no Kuni both explore themes of guilt and existentialism. However, they explore them in different ways, which is ultimately why this recommendation is so consequential. If you enjoyed Houseki no Kuni, you likely won't enjoy something that treads the same ground, but instead you'd probably enjoy something that approaches it in a new way.