so joon was abused once (dont know yet in what situation) and yoongi was there, wanted to help him but couldnt (for some reason idk yet).
months or weeks later (up to the bg story) they encounter again, yoongs (fall for him and) wants him as his sub. namjoon recognize him and plot to be his sub(, make him fall for him and then) ruin him (in the bdsm community).
important things: 1.namjoon is a SUB since he was raped/abused, not an "alpha male" like other stories, so all his actions will be under this characteristic. i prefer no "braty" behavior too. 2.yoongi will not be a soft dom.