"With you in the world where light shines."
I'm not sure I've ever heard a title, even if it's a mock in-universe title, as banal as that. It must have been the author injecting some sarcasm into this story, which, at the first glace, is just a typical cliche fest itself.
It remains to be seen if this is one of the series where the game heroine is wicked or not. Or if the villainess is forced to be evil even if she never did anything wrong. Unless this chooses a new path and the game heroine never even makes an appearance.