Do the Chainbreakers sometimes make quick trips to certain worlds where they bully the isekai power-fantasy protagonist into giving up his slave harem?
*arches eyebrow*
Either you're referring to a certain one where the protag honestly loves his dungeon crawling slave-harem: and its outright stated that if he dies, everything he owns goes to his first one (not that he knows she's made plans to die with him/not live without him). IIRC, if he attempts to frees them, either they end up dead instantly as an auto-kill effect activates, or they instantly become available to be bought by someone else. Who'll likely use them as cheap/expendable dungeon fodder. Meanwhile, his girls all currently have living conditions, with him, better than any royalty on the planet, and he's violently protective of them if you harm one.
If you're referring to Shield Hero? Considering what was done to him, the Chainbreakers would have very good reasons to use an extremely light touch on him. For one, he does it to rescue them and then practically has them raised to a living standard higher than most nobles, or even royalty. Two, a certain Tanuki would rather die than have her seal removed unless it was willingly done so by him, AND in the same exact moment, he proposed marriage to her. Otherwise, she'll slit her own throat. Three, the damage done to him is near permanent (anything less than Troi and a decade of therapy, won't cut it), and that he will automatically assume they're there to steal and/or kill his slaves and put them in WORSE conditions. Aka, he'll fight (and die),
believing completely that the Chainbreakers are spouting lies/bullshit, and just want to pull a power move to get fodder/sex slaves. In many ways, he's like a certain Princess - just that he has to keep those he rescues as 'slaves' in order to keep others from abusing them due to how the whole world's system works.
If you mean Redo of Healer?
Yeah, fuck that guy. Yes, he went through hell, but he snapped and came out worse than his captors/party members at the end.
Although, to be brutally fair, to hell with the harem slaves too, as they are just as bad if not worse before he broke their minds. I made it 50 pages into the LN, before turning around and returning it to Barnes & Noble, with a VERY strongly worded review about allowing it on shelves without plastic wrappin (a very immediate clue imo, to avoid certain series). Just about the only not truly F'd up person in that, is the young demoness who wants to become the demon lord so she'll stop getting abused herself. Otherwise, might as well raze the entire planet, its just too badly screwed up.
If you're thinking Musou Tensei, the protag has 3 wives, no slaves, has a merc group pretty much already dedicated to freeing them, and its only his one ally that buys
one, and even then that (very mild, borderline, functional) sociopath eventually frees the girl after practically giving her a college education on the sly and she still ends up as his personal lab assistant/secretary/maid, more or less, and inevitably ends up damn near a power behind one of the various thrones in the setting due to her education.