The original game (Android/iOS) was released in 2017 as a side-scrolling shooter, created by Shanghai Manjuu and Xiamen Yongshi. The Shanghai-based publisher, Yostar, published the Japanese and English version of the mobile game, popularizing the game to more mobile users across the world.

In the mobile game you lead Kansen - beautiful girls inspired by real-world vessels - into side-scrolling, shooter RPG battles. The Kansen can be formed into units and trained using a variety of robust, in-game systems.

With the option for manual or auto play, the game can be enjoyed by all players, regardless of their shooting game skills.