So Hyo un made the black orb that connects their souls forever. The orb retains Hyo Uns memory of his beloved and his experience/love for him. They are somewhat interacting with the flow of time by passing through each memory. Tae fully breaks the barrier between them and the past by stopping Hyo Uns past self from committing suicide. Hyo Uns orb allowed Tae to transcend time and travel back to stop Hyo Un from killing himself. Taehyuk is no longer in just a memory because he directly interfered with Hyo Uns past self. Of course this is just a rationalized theory, lets see what happens
I wish Riftan would, when the time is appropriate of course, stop being an angry sack of shit and literally just have a regular fucking conversation with this woman and treat her like a human being capable of making complex decisions and caring for herself. The way he's infantalizing her like she's some porcelain doll is so infuriating and it's literally only because he refuses to TRY and communicate with her. She is the only one attempting to have a conversation while he wants to brood in a corner and worry and be angry over a situation that could've resolved itself with literally just talking calmly. I cant stand the fact that while worrying about her he is disrespecting her feelings, her autonomy, undermining her intelligence and completely disregarding her skills to boot. He can't even be supportive and say "I appreciate you. Thank you, Im so proud of you".
Brother what was the point of that story