Mature Content Description

The developers describe the content like this:

WARNING!
This game is for ADULTS only and contains sexually explicit material that some viewers may find offensive. The game contains sexual violence, sexual relations without consent, bondage. All characters shown in the game are over 18 years old.
About This Game
I will obey you, Mistress — is a relationship simulator. You play as a young boy who has been 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.

Your mother asked her old friend Mary to take you in while you are studying at university. But she doesn't know what a pervert Mary is. She will let you know right away who is the master of the house and who is your new Mistress. You will do everything she tells you to do. Lick her, spy on her, lick her ass. She will punish you even for bad grades... All this will be accompanied by realistic sounds and music. Immerse yourself in the unforgettable atmosphere of Mistress Mary's house.

The game has a strong focus on femdom content, such as pussy worship, foot fetish, mistress, bdsm etc.