The Last Bloodline

Story:

A hierarchical society where blood decides everything was born after civilisation fell. The wealthy rob the poor of their blood and lives while celebrating in their own eternal lives. Saya is a royal who has been given endless youth, while Nagi is a commoner doomed to an early death. Their chance encounter causes the walls of a civilization that is based on extreme injustice and discrimination to fall as a result of their innocent love.