You Have to Be Crazy to Succeed

It's not bad, the setting is a bit special, the mother and daughter are transformed into souls, the mother is transformed into a girl, and the girl is transformed into a mother. They can travel back to their home in the original world (it's their space, I guess) and the things in it can be used unlimitedly as long as they are used on themselves. They can hide in the mountains to avoid war and learn manufacturing skills through their mobile phones... The whole story is a bit confusing.