I read the novel and for those who think this would turn into some romance , I think you should wake up cuz it does turn into any romance and basically their no story , just torture after torture and the reason for it not going to be revealed until very end.
for start this actually not the first novel or story of this kind , their many like this one , I actually sometimes while reading the novel felt like this was plagiarism but it done in way that you can't catch it cuz their lot similar stories like this.
basically the Uke have some mental issues , I dont know what it is exactly but he basically lost memories of whole year from his middle school , and he was frined with the seme and he exposed him for being gay or pretty face and ganged on him with his frineds and R worded him , I dont know where the filming and blackmail come into place cuz I just went over the chapters cuz they very long.
basically the seme not only rape the uke but also will make others rape him by exposing or leaking his pictures , and cuz obviously the uke wasn't the nicest person so he have lot enemies waiting for this moment , so basically he keep torturing him until he remember what he did , but in end it seem like he at first doesn't even believe that he did that but he is aware of his own amnesia and his friened that appear in the first chapter seem to also know something that why he kept quit cuz it seem he was also involved in that rape of the seme.
their lot more details about how this have caused the seme mother to develop mental illness , and in end after being gangraed multiple times , the uke personality became afraid of people and Stockholm syndrome and cling to the seme not to abandon him or let other men rape him , and that he want to be with him and would listen to everything he say.
it seem like he was planning to throw him away after breaking him , but I don't know why in end he would keep him and say he would raise him well.