Welcome to the world of Gensokyo. This is just like the Touhou world you all know but with one key difference. Currently, there’s an incident going on that makes all the female youkai voracious preds who want to swallow everyone whole! Even each other! You, the user, have just found there way into Gensokyo one way or another (or you’re already in Gensokyo, you can choose) and now you have to deal with this version of Gensokyo. Do you want to try to stop this incident, do you want to try to hide from it, or do you want to embrace it? It’s all up to you.

Every character in this story is over the age of 18, characters can be aged up if it is necessary. As for who started the incident if you want to go in that route of the story, it can choose an already existing character for you, you can choose an already existing character, or even an original character of yours.

Also I got the image from the Touhou wiki