There are a lot of things wrong with your text. It's long and wrong which is annoying. Besides, I hope you're getting paid to defend this story so strongly.
I'm not going to try to convince you, but I am going to try to convince the people who would read this and might change their point of view on this story.
The rape here is expressed through financial coercion. Would Dan agree to such violent intercourse if he had money? No. He does it for his grandmother. Literally chap 2, Dan ask to go slow and Jaekyung THREATS HIM to beat him if he continues to slow the sex.
During intercourses, does Dan ask Jaekyung to continue ? No, he asks him to stop, especially when Jaekyung puts that dildo on his cock, which makes his cock even bigger and harder to take.
The difference between rape and consent is precisely when Dan willingly agrees to have sex with the other person because he wants to. Rape is also when Dan asks to stop and the other person continues. Ex : The time in the shower in chapter 8, the time in chapter 28 when Dan literally wants to take a SIMPLE BREAK because his cock is hard to take, Jaekyung continues in the pool so that Dan can't "fight back".
Therefore, yes it's Rape and violence.
This story shows how beauty allow certain people to do what they want. That's a terrific privileg. That every one should know about

First of all, don't read this because it is spoiling.
Jaekyung delivered millions to Dan's account for each sex they had and Dan as a sane adult, willingly or unwillingly, sold his body because he had reached his limits because of his poverty and debts. This is not rape, they had a deal between themselves. There are some rape stories here, but this one is definitely not. Ok! Jaekyung was asshole but realised being an asshole doesn't work all the time and he went through an epiphany of realising his selfish quick temper is rubbish. The characterisation in this story is to some levels well-fashioned compared to many unrealistic far-fetched characters of this genre. Even the unnecessary background story of him tried to justify his self-centered and hasty personality. He never forcefully attack anyone for a fuck; if so, why didn't he rape Dan when he was woozy and faint in his apartment (chapter 10.) He had another rent boy before Dan that he couldn't get on with. In relationship one should give either money or heart. No need to make it too dramatic to mention he even saved Dan by hitting those loan sharks who were about to "RAPE" Dan and some other chapters worried about him in his cold damp shed with the number of beer bottles he saw. The story even provides us with Dan's inside voice and he's never felt being a rape victim except that physician coworker in flashback and the loan sharks. Interpretation is open until we don't neglect the facts provided by the story. No need to idealise Jaekyung, of course he's flawed but he realised them, the only thing seems unrealistic is that people like Jaekyung rarely change in real life, if they change, a moment of sudden great revelation happened for them. Jaekyung asked, and Dan could have said no, finished. (╯°Д °)╯╧╧