My saves were broken too, but I really don't mind! I play a lot of VN games, so it's helpful to get a refresher on the story. Just starting over and meeting Koko again sparked my memories, but I don't exactly remember what happened last, so it will be really helpful to start over! I really appreciate it when VN's give a short recap on each major update, but it isn't a big deal if you don't want to do that too. :)