Chimimo

In her house, Mei Onigami discovers a peculiar circular object that reads "chimi." She consents to agree the being with her sisters Mutsumi and Hazuki till its true owner picks it up. But as soon as one of them utters the word "Hell," more creatures show up, eventually numbering twelve. The sisters don't think about this before the creatures construct a portal that summons an ambassador from Hell. Jabberwock the Eighth, a man covered in fur with horns and fangs, has come on the orders of his superior to create a living hell on earth. But when he finds it hard to survive in the human realm, the Onigami sisters let him stay with them. They also accept the "Chimimoryo spirits," or round devils, he conjured up before him. This envoy from Hell is known as Jigoku-san by the Onigami sisters, but if his goal is to dominate the world, he will have his work cut out for him. He will first need to persevere through the struggles of daily life.