: A woman surviving the terror famine and the approaching Eastern Front during WWII, focusing on the will to survive and protecting her family.

I could not find a specific "deep story" or book titled Cream starring a "Teen Vika" that matches your description exactly. However, there are several distinct "Vika" characters in media and literature that might be what you're looking for:

: An impoverished teenager who is suddenly thrust into a world of immense wealth after being mysteriously included in the will of a deceased billionaire .

: A scientific officer and mathematical wizard who is one of many clones navigating life after being captured by a mysterious alien entity.