Kitsune no xxx

Because of your frail health from birth, you have been living with a servant in a mansion secluded from people since the age of eight.
Even after nearly eight years had passed, there was no sign of your health improving, and you spent peaceful days with the servant.
However, one day, due to a fox mask given to you by the servant as a charm, those days gradually began to fall apart…

[Translated from official game synopsis]