Dan is obligated by contract to have sex with jaekyung and he KNOWS. Jaekyung should start asking for permission, even more so after those traumatic chapters with cold Dan forcing himself to have sex. He isn't dumb, and asking is possibly the most attractive thing he can do for Dan specifically, it would absolutely swoon him. And the readers too.
Having experienced it or not, we haven't gone through what Dan has. He clearly only got excited after he realised jaekyuing was making an effory to makd him feel good, not while he was being agressive and only caring for his pleasure, nof asking anything. Also, sex is not only penetration, you should know that, since you're apparently at smut-reading age. They already are having sex.
English is my third language so sorry for not expicitelly describing penetration. Sex was a big part of their life and one of the reasons Dan fell in love with jaekyung. It is understandable it will play a big role in their get together. And maybe jaekyung will ask for permission to enter him. Also Dan never said stop. He always said stop when he didn't like something. Maybe if he said it jaekyung will stop.
When are you deranged people going to understand that not saying stop DOESN'T MEAN consent? Are you children, rapists or plain stupid? Actually remove children, since they actually DO understand consent. Also what does english have to do with it?? It's also not my first language, but it doesn't change anything?? Did you want pity or something? It makes absolutely no sense in this context
Geez we are not talking about consent in real world but in this comics particularly, when Dan did not want it he always said stop. Also we can clearly read what is on his mind and he not a once said in his thoughts that he does not like it, that he is scared or what ever. He even said he is enjoying it...

Was hoping for a little consent but whatever ig