attention \ kth&jjk [UNDERGOING REWRITE]
It had crushed Taehyung that Jeongguk cheated on him, messing with all sorts of attributes to the male's personality. He didn't deserve the neglect, the lack of attention - he wanted it back. However he wasn't going to be the pushover he once was.
He wanted to make sure Jeongguk understood how it felt to be crushed by someone he adored, to teach him a valuable life lesson, not to play with people's emotions. After all, karma really is a bitch.