He is a righteous sword cultivator; she is a Saintess of the demonic path.
In her previous life, he killed her with a single stroke of his sword.
In this life, he finds her with all his memories intact, yet he cannot tell her, cannot acknowledge her, cannot love her.
She doesn't remember him.
But every time she sees him, her heart skips a beat.
Later, the Heavenly Dao demands that she become a sacrifice once more.
He betrays the righteous path and stands before her.
He says, "This time, at least, I didn't leave you alone."
Then his soul scatters into nothingness.
I owe you a lifetime. I'll repay it with my life.
Theme: Whatever the world says about the righteous and demonic factions, I will never let go of your hand.