this is why I hate open endings.. I'm so fucking CONFUSED (╯°Д °)╯╧╧

Yoooooo i am more confused than ever, does seme have a fetish of hitting the one he loves like of those extreme sadist. No more than that, is there something traumatizing thing happens to the uke, he looks so empty and he got the face of someone who is used to getting hit. Any backgrounds?? Wtf is happening Σ(っ°Д °;)っ