I will obey you, Mistress — is a relationship simulator. You play as a 19 year old boy who was taken in by Mary. Mary becomes your Mistress and does whatever she wants with you. She makes you lick her every day before going to university and satisfies her many sexual mischiefs.
The hero enters the castle of the succubi to exterminate the succubi who are troubling the village. Once inside the castle, the succubi attack him using all sorts of sexual techniques, but...