After I met that catgirl, my questlist got too long! Hotfix 11 + DLC by Rascal Devworks - Adult Sex Game

While on a patrol mission, Vera sees a thunderbolt hit the Elder Tree in the forest. Curious about the mysterious phenomenon—the sky is clear, after all—she approaches the location.
...wait, what is a catgirl doing there? And why does she claim to come from another world called 'London'? Everybody knows the world is called Morpheya.