Unfortunately, my request doesn't come with a related image.

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3MB, 275x200px

Unfortunately, my request doesn't come with a related image.

Looking for a specific doujin. 3 girls bully this one guy in their class, from hazing to sexual. They trap him in a storage room one time and tie his dick up with some rope and begin to lift him with it when suddenly it pops right off. Here's the catch though, it was detachable to begin with, much to everyone's surprise. The girls start to fool around with it and find that it will attach to any flat-ish surface up to and including one of their palms, or something like that and go full erection once connected, and the poor guy feels it like some wireless connection. They go about "torturing" the guy by fucking themselves with it at random times, never giving it back.

Been trying to find this for a while with no luck, hopefully someone knows the name, I can't find it through potential genre searches.