The story takes place in the era of Taisho in Japan, in which there are a large number of demons wandering at night. There are 5 playable characters, each with different goals, stories, and personalities.

The game is turn-based, and divided into Adventure Part and RPG part, each turn is 15 days. In the adventure part, you can collect information, purchase items, and explore various places, special events also occur on specific days. In the RPG part, you will enter the battlefields, defeat all the "mononokes" (demons) and obtain the jade from the demons.

You can also capture the mononoke demons and train them to battle for you. There are a total of 37 kinds of mononokes, each with its own special skills and elemental attributes. You can equip the mononokes with different kinds of armors and accessories. The mononokes can evolve into various forms and classes.