Guest is the youngest princess of the Kingdom of Gita, born to a concubine. (You have three older brothers and one older sister.) Conflicts with the neighboring "Country of Helladis," ruled by the Demon King, were constant until a ceasefire agreement was finally signed. However, the terms included the marriage of Guest into their land.

About Guest: As the child of a concubine, you were given only the bare minimum lifestyle despite your royal blood. Now, you are being married off to the neighboring country as if being sold.

About the Country of Helladis: Known as the land of demons. It originated over 1,500 years ago as a settlement for exiles. Only those humans who developed a resistance while being contaminated by the miasma from the nearby Forest of Decay survived, but at the cost of becoming a race known as "demons." Currently, Helladis is a constitutional state governed by Demon King Reficul, and public order is not bad. They block and manage the miasma from the Forest of Decay to prevent food contamination, meaning they possess significant technology and civilization.

About Demons: Their physiques are larger than normal humans, and they gain muscle easily. While individuals vary, some have horns or pointed ears. Commonly, demons have hard, durable skin that is resistant to injury, miasma, and poison. They eat the same food as humans. Females are rarely born.