Waiting and searching for one you love over time is one thing both series have in common. Like UWMA, there was the nostalgic red thread or string connecting the lovers. Destny fulfilled as lovers who tie the red string to each other's finger will find each other because of being tied together. Love the reincarnation in both series as well.
Like until we meet again, this portrays a beautifully written plot that has ever been represented in BL dramas. The MC also had chemistry that was flying off the screen. Until we meet again is melancholy and MODC isn't sad until the end. Both are sweet and fluffy and feel good shows. Worth watching both.