She was his queen. After she helped him become emperor, she was framed and forced to hang...
She is his royal sister-in-law, but he has always loved her and given her silently...
She was his junior sister, but he sacrificed his life to protect her from harm...
She traveled with her to this other world, just to find her unfinished love in her previous life first...
She came into this world with her, and thought she could live a lifetime of sharing joys and sorrows, but she didn't expect that she turned out to be the most beloved princess of the enemy's emperor...