He is the king and emperor of the continent, but he can give up his honor for his lover. The poison he planted made him unable to extricate himself.
She is the eldest sister of the demon clan. Because of the destruction of the demon clan, she made a poisonous oath to turn against her lover. This was for the sake of magic, no one knew...
Their love for each other is a blessing or a curse... An enemy or a friend...
Trust is their red rope; mistrust is sometimes the source of their severance of relationships. When they came into this world, they were just like the "cups" placed on the coffee table. No one knew the ending. What the hell? ? ?