Sadistic Lover Grace
There is a dubious hall where there is a lady master who can solve the problem that no one can talk about. "There is no limit to the desire of a person, you must also become a monster in order not to be eaten by a monster."
Her rope wraps you and releases you. Like a pupa to be a butterfly. A strange customer will visit tonight …
(Source: Lezhin, translated)
Note: Includes 3 extra chapters.