These two series are (beside being my favorites) BL college romance. They are supernatural; one has ghosts and the other is about reincarnation. Their stories unfold and reveal truths that link from their past-life. They're also good tearjerkers.
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.