By accident, you broke the seal of the mysterious book, which contains an enormous magical power that allows users to control any Yokai by defeating them and recording their names. This godly power is too much which alerts all the Yokai. You must find your own way to defeat them and survive.
The game challenges players to strategically place and upgrade various tower units on a chess-board style battlefield to defend against waves of advancing Japanese yokai (supernatural creatures). Defeating enemies earns resources that players can spend to strengthen existing units or unlock new ones. Each unit has unique attack patterns and abilities, requiring careful consideration of their positioning and upgrades to counter the diverse yokai threats. A key differentiating mechanic is the ability to evolve and upgrade individual units mid-battle. As players defeat yokai and collect resources, they can invest in enhancing a selected unit, causing it to transform into a more powerful form. This risk/reward system challenges players to decide which unit to focus on improving while managing their limited resources.
The game features a diverse bestiary of yokai enemies, each with their own unique attack patterns, movement behaviors, and elemental affinities. Recognizing and countering these elemental weaknesses becomes crucial, especially on higher difficulty levels. Players must carefully observe enemy compositions and plan their defenses accordingly, often switching up their unit lineup on the fly to adapt to changing battlefield conditions.
As players progress, they unlock new yokai units to add to their roster. Each unit can be further customized and upgraded through a talent tree system, allowing players to fine-tune their capabilities and discover synergies between different unit combinations. The game also features a relationship/affection system, where players can "bond" with their yokai units by cooking them special meals, unlocking cosmetic changes and small stat boosts. The game offers a range of difficulty settings, from a more casual "Chill" mode to a challenging "Hard" mode. The increased difficulty not only alters enemy compositions and wave patterns, but also introduces new mechanics, such as more limited tower placement or powerful elite yokai that require specific strategies to defeat. This scalable difficulty, combined with the game's event stages and optional challenge modes, provides a substantial amount of replayability for fans of the tower defense genre.