The two things I thought was interestingly explored was how the familial structure would work with one really long lived immortal relative actively living with his descendants and how the reincarnated soul is completely their own person or even persons separate from their former lives. The weaker elements was how sudden and arbitrary the abilities and the punishments of the miracle stone are. It can heal, which is broad enough that anyone could figure it out. But how did the savant guy suddenly know that he can feed half to San and it would give him exactly 100 years of immortality with him being stricken by pain every midnight, and transforming into a child every 15 days until he is able to find Wat's reincarnation for a blessing/curse breaking ceremony? Maybe a scene of him divining instructions from the goddess or having a instruction book from the ancestors would have tied things together better. Also the youngest generation of the savant guy is pretty much San's best friend, which is kind of odd since San would have been like his uncle, having been part of his family's life for generations and there is no sense of that from their interactions. Also the show doesn't deal with why San deserves the destruction of the healing stone for him? Especially when the story immediately follows into scenes with Vee's terminally ill grandmother, the type of people the stone could be used to help. The stone could be used to heal and help people, but now it's used up for a pretty random guy in the grand scheme of things.

I really liked that Vee and Wat have no memories or any personality quirks or similarities to their past life as 1920's Wat aside from Wat having the same face and that they were incarnations split from the same soul as confirmed by the stone reacting to both of them and they both needed to be present to lift the blessing/curse from San. Vee and San may have been drawn together supernaturally, but they fell for each other on their own terms. Though San didn't treat him very nicely for a lot of their meetings, so maybe Vee may have been more influenced that it seems. It's so fascinating and there isn't much media that I can remember that explores this aside from the mention of splitting souls, which was mostly from older Cantonese supernatural stories. But then the implication is that Wat is somehow exempt from San's promise to love and cherish her in this current life even though she's also the soul that was bound to the promise. The potential for a bisexual polyamorous thruple is just plain ignored. Wat was a rich girl and reborn as a regular guy and a girl that seem to both be in the lower income bracket and both get intwined with San. It would have been nice if the show explored why Wat's soul was split, like as a side effect of her soul being tethered to a rock and a man or something? Doctor Tri is also an interesting case who has also been reborn looking like his past self who was a violent jealous man, but his current self is an amazing friend who goes above and beyond. He didn't really get any karmic punishment that was evident in the storytelling except for falling for Vee in this life as well, but he's also deals with it with the utmost maturity which was really nice to see.