It's interpreted by everyone after the last chapter, in the last panel where Yujin woke up with Aaron kissing, sucking and biting his body. Well it didn't actually show that but there are suck and bite marks all over Yujin's body.
I’m gonna be honest if you can’t gather where people are seeing the rape then I think you just tend to overlook things because you know the backstory of the characters. I promise I’m not being a douche bag and I have no ill intent, saying this. Aaron woke up completely naked with bite marks and hickeys covering his entire body that was just unconscious. Not to mention his ankle is literally chained to the bed and when he asked to be released, he was denied. I think BL readers tend to have a problem, seeing rape because they incorporate backstory with a lot of of the sex scenes which you don’t realize is your brain basically excusing what’s happening because you know the reason why. But at the end of the day, it’s still rape.
Could someone please point out to me where they're seeing rape?
We've got Yujin who desperately craves love and is equally terrified of it too (curse his father). Who falls in love and then runs from it (literally).
Then he spends an entire year watching movies of Aaron and pining after him.
Yujin would be throwing himself at Aaron if he wasn't such a tsundere.