幻想郷に迷い込んだ貴方はとあるメイドさんに出会います。
わけもわからぬままに大きな館の地下に連れてこられた貴方。
今から一体ナニが行われるというのか…

You wandered into Gensoukyou and met a certain maid-san.
You didn't know what's going on, but you were brought along to the basement of a big mansion.
What on earth is going to happen now...