After watching The Anime Man's review on this manga, I immediately decided to read it. It's pretty bad, but in a fascinating way.
I don't usually read/watch isekai/fantasy/rpg media, so I have no idea how cliche this story actually is. The magic system is pretty bonkers and basically exists to ensure that the story continues forward.
Summary: MC is a healer hero, who can only heal people by reexpierencing and absorbing their pain. He gets picked up by some party members, who treat him like shit. This includes: 1) continuously raping him to increase their power levels? 2) forcing him to cast healing spells despite the excruciating pain 3) giving him an addictive drug in exchange for healing spells 4) treating him like a literal dog- leash + cage + dog commands 5) constantly treating him like garbage. (All in one chapter!)
Four years of this shit- he somehow becomes OP enough to go back in time to get revenge against his party and the entire kingdom for crimes against humanity (demi-humanity😕). His revenge includes more rape, brainwashing, slavery, poison, and so much more!
I'm not sure who would enjoy this. Fantasy nerds will probably be annoyed by the bizarre magic system. Perverts probably won't want to slog through story explanations between sex scenes. Morally decent people will find themselves appalled by how unlikable and bland every single character is. Really, only weirdos who are interested in how the hell they will adapt this into an anime will enjoy the read.
4/10- the continued decline into moral atrocity, as well as the increasingly nonsensial magic system, will keep the reader from being bored, but you are guaranteed to hate yourself after reading it.