I feel sorry for Gong Ou’s “lost” four years away from his beloved, but I felt like it was his stupidity that made that happened. It’s exactly like Mona said, it’s ridiculous that he went to her to asked to be cured when he humiliated her and her entire family by abandoning her on the altar. Also, he knew that it was Mona and Mu who schemed first to make his illness worse by releasing all the infos to trigger him, yet he went to her for help? Stupid doesn’t even express his decision. This man is made of poor decisions, everything he decided to “protect” the one he loves, ends up being a suffering for the intended party. He decided to break up, he decided that Nina’s child is not his despite being told otherwise, he decided to openly agree to do the engagement oath (he didn’t think that it will torture Nina? He didn’t think that, that will hurt her even more and made her hate him, which what happened), he decided to go to his enemy for treatments (what a joke), he decided to go to the hotel to spend the night with another woman, albeit had another plan, but why agree in the first place? he decided to kill Mona then himself (talk about selfish, only thinking about himself)...all the sufferings started with him, happened due to him, from the beginning to the end. Nina has been suffering throughout their “relationships” no break but a momentary happiness that seems more like an illusions.