I'm a little confused. Does it actually have to have the fantasy genre or was that just a descriptive word you used? And as long as is has the premise of going back in time and becoming young (even without that genre specifically marked on MDL) it's fine?
10 dramas/movies where a lead character is cut-off (money-wise). So, they should be from a rich family, and for whatever reason, their parents/grandparents/whoever stops providing them with money, making them fend for themselves. This doesn't have to last long, just a short time is fine.
2. Addicted Heroin (one of the MLs is from a rich family and he gets cut off from his dad's money for a few months. Actually, I think it's even longer than that but the series got cancelled mid-run so...)