Demon King: "Seduce the hero with your charms!!!!!"

B-Eldia is a planet where humans and demons coexist. Wilhelm, who is known for his intelligence and beauty at the demon world's megacorporation, "Great Demon King Company," is an elite office worker who can handle any difficult task. His latest mission is to seduce his arch enemy, the human hero Alberto, with his charms!? Even though he has zero experience in love!?

A super strict and insensitive handsome hero x a super shy, 40-year-old (387-year-old) beautiful demon, a huge interspecies love with a huge age difference!