The start gave me a lot of expectations, but hardly kept up with any of them.
The art is very good, and at the start the characters feel quite interesting. But the story never moves forward. Nothing ever happens romance wise, the mc never starts anything on his own and a dozen of chapters in the torture games they play start feeling incredibly boring and repetitive.
Overall I would say the word "stagnant" fits this story perfectly.
Good start, good premise, high expectation, but never ever moving forward.