There is a collection of books handwritten by the survivors of the first war against the demons where it's narrated that under the island of Jiin there are two forged doors that enclose the infernal forces expelled by Arashi "the Exiled". A hero disowned by the false emperor, who has plunged the country into a punishing civil war facing a population that awaits the return of his hero to rid them of the tyranny of a mad throne and the rumors of demons returning to win back with blood what they once lost.

Yohei is born from the combination of the mysticism of Japanese folklore with a fantasy universe created for a wargame that faces asymmetrical clans in modular boards with numerous and different game modes. It combines mechanics such as dice rolling, grid movement, variable players powers, modular boards and card management to develop our strategy during the battle by acquiring warriors, invoking powerful event cards, legendary weapons and the construction of buildings that lead us to victory in exciting games of 60 to 90 minutes.