it starts off with an author isekaing into their story or a game. The ML is OP and lacks emotions. But basically they are in a deadly competition with other people in a game show like setting. When they survive, they isekai back to the real work, the ML gets to enter the real world basically despite being from the game. And then after a bit of yapping they both get send to another world, a prison setting. The ML needs to gain points of some sort to stay in tbe main world I think. MC had like red or orange hair or maybe it was his jacket, smth striking, and ML has black hair iirc. non explicit work.
Maybe Kiss of the Abyss? I can't remember the plot exactly but it sounds similar https://www.mangago.me/read-manga/kiss_the_abyss/
For ppl who are sus about the second child and/or any dub-con sex they might’ve had, yes a safe word would be cool and call but this an abo. If our uke wasn’t happy, our seme would be able to tell from his pheromones and adjust. So there’s this undertone of consent through that without dialogue. Please keep in mind. This is my headcannon