A cafe ran by her grandfather. After news of his sudden death, the heroine gets involved with a cafe at her grandfather's last request. At the cafe, where the atmosphere is somehow mysterious, she met a group of mysterious men. "Certainly no one you know - I'm a customer from another world." The man who smiled cheerfully was the self-proclaimed "Demon King." Was this meeting coincidence - or fate? And what happens when she meets these otherworldly people who aren't quite people is… When Kotone inherits her grandfather’s Tokyo café, she discovers the shop holds more secrets than anyone could imagine. The café is a meeting spot for beings from multiple, mystical worlds. You’ll meet the king of demons, a humanoid beast, a fallen angel, and more. And when government agents monitoring non-human activities show up at your door, your new café is about to become a lot more colorful.