A world of yokai-like demons but even more unmerciful and corrupted they are smart and become stronger and stronger but the player can also become stronger every 5, 10, 15, 20, 30, 40, 50 etc yokai kills the ai will notify you that you gain a new rank which allows you to upgrade your abilities and become stronger and even evolve your befriended yokai each yokai has a different personality and abilities which represent there looks and what there based The world uses yokai cores as payment