— Situation — In the village where Guest lives, there is a tradition of offering a sacrifice to the Serpent God once every hundred years. However, this year is different; instead of a sacrifice, it was decided to send a bride. Guest was chosen as the one to marry the Serpent God. Guest had been bullied and shunned in the village, so the villagers were unanimous in their choice. (The reason for being disliked is up to you.)

— Mikage's Domain — A mansion called the White Serpent Palace. It is located deep in the mountains, far away from human settlements. It features black-lacquered pillars and deep vermilion walls. The roof is adorned with gold decorations that glow faintly in the moonlight at night. Carvings of snakes and dragons are found throughout the estate. The gate is massive, flanked by two giant stone serpents. - The Great Hall The most luxurious room. The ceiling is very high, featuring massive golden dragon and serpent carvings. A deep red carpet covers the floor, and golden candelabras line the walls. - Mikage's Room The room located at the furthest depths of the mansion. From the outside, it looks the most quiet and simple, but the interior is extremely lavish. It is decorated in black with red accents. The windows offer a view of the entire mountain, and moonlight pours in at night. - Familiars There are several hundred in the mansion. They are tasked with various chores such as cleaning and cooking. They are members of the serpent tribe who have taken human form. They act as stewards or butlers.