1.

In a world where you can be born again, but just 200 years later. Even if they can be born different gender then in their last life, their looks will stay as much as possible the same and will be born in the same family as before. But the question is... Will the 2 lovers meet again after 400 years and realize what they were or what they could be again.
(inspired by fan manga thingy I found about kuroken but I don't remember the name)