Help

There was this manga where the uke was restricted by his uncle or something not to go out and talk to anyone, just go to school. A guy though talks to uke and is older and takes him out of smth then later on we find out he has issues with the uncle and used the uke or smth, but he takes the uke to an island and locks him up as bait, but then the uncle doesn't care enough for the uke so he doesn't want to give the seme what he asks as exchange for the uke. Smth like that