In Japan the 'isekai' theme is all about traveling to different worlds. With the power of AI you can live in them, and combine with a RPG system and you can level up and play it any way you want. Isekaigen allows you to play as any given character in your own world or worlds of other users.
It provides a 'Story Mode' for anyone who doesn't want the leveling up systems and a 'RPG Mode' for those who want to build their stats, level up and fight battles.
