u/ActingApple

I'm trying to find the name of this one specific anime that I watched a while ago but I can't for the life of me remember it. all I remember is a scene where the main character is in school using a rice cooker to refine pills and I think the end of the season destroyed the world and it was rebuilt by the mc? I'm sorry I know that's not much to go off of but it's all I can remember.