I know what your trying to say, but as a fellow reader it's better if Jisuh just put some distances rather than taking a revenge. I mean who would want to hurt their special someone. I know this is just me , but as a reader it's just giving me an impression that Jisuh doesn't have any feelings for Heejae. After all Heejae went through a lot of troubles because he want Jisuh and trying to understand his sister words when he was a child (the card game , remember ) At Heejae point of view it's better if it's all a game. But it's just happen that Jisuh see's Heejae in his weak point that Heejae unable to deny Jisuh mean to him anymore. So giving a lot of consideration with the two character is what I'm just trying to find. Don't you think also??, if Jisuh have known the cause why Heejae acted that way , I think Jisuh would think in a different light. So putting some distance and see through inside of Heejae the best way for me. But as I told you understanding is same goes with Jisuh, he was just blinded by now because he cherished Heejae more than anyone else. That's where I find Jisuh saying his alone again. But still a very critical relationship now than the scenario of just making up for all the misdeeds and misunderstanding. Now I'm just confused how will the story end, tragic ending might not be bad and sad one also.
I'm living for this plot twist!! I only hope that Jisuh will see through whatever it is he has planned without feeling guilty about it. Heejae deserves every horrible thing that comes his way! He needs to learn that people aren't his play things, and actions have consequences.