I can understand that you guys like mujin and I liked him too (at first👀) but he knew that they liked each other and still turned their life upside-down by manipulating the both of them. If only he had helped them to get together none of that would have happened. He could have moved on to find the love of his life, and the two other would have had an happy ending but no he chosed he's feelings before he's friend's feelings I understand that you love him but that ain't the right way sweetie you're taking the toxic way