@Bl.lover this transaction didn't start with Jaekyung and Dan being in the same financial position (plus it's not really a transaction if you think any amount of money gives you the right to someone else's body). Jaekyung always had the uphand and he knew that in scenes like chapter 8, where he would reference the condition to emphasise the financial power he had that he would leverage to violate his boundaries for his own pleasure. Just cause he paid justifies him disregarding his autonomy. Also, Jaekyung recognises that he took advantage of him and his economic deprivation.