I Became the Demonic Cult Leader's Husband

I became the first son of the Demonic Heaven clan—one of the Six Great Clans of the Heavenly Demonic Cult—Jin Yeomyung. I was ready to enjoy a sweet life with a silver spoon in my mouth, but thanks to that damn Murim Alliance, the Heavenly Demonic Cult was destroyed. But in my final moments, Cult Leader Cheon Yura turned to me and said... "Would you mind seducing me?"