Sorry. All i know is the mc forces himself on a possessed girl to save her I'd call that rape right?
Would you call a surgeon cutting open a patient, assault with a deadly weapon?
The Body being "raped" belongs to a dispossed spirit (the companion to the MC), which is currently inhabited by a demon, the premise of the sex attacks in this game is to cause the demon to let go, without causing damage to the body.
This is such a grey case of rape.
The Demon says "no",
The Spirit says "Are you sure this is the way" then "teach this bitch a lesson",
Is it rape when the Owner of the body says "yes", but the possessing demon says "No"