how she got kidnapped or how they first met

They reincarnated together for several lifetimes but wasn't able to get together for some reasons (mainly, it's caused by ML's evil qi). So when they're finally together in this lifetime, I wish I could see more of their life after that. It's a pity though because the main story ended after they're married.

There is a female pe*verted ghost who was shy in life but decides she wants to take advantage of handsome men. These men end up sticky and slimy. Take from that what you will (I admit, I giggled like a thirteen year old).

When the MC encounters a bad Celestial Master who destroyed her talisman, she helps beat him up with a ghost. Her brother shows up and this leads to an awkward moment where she can't think of how to explain. The pe*verted ghost literally shouts "Say he mol*sted you!" and it's pretty hilarious. *Please note that I don't condone false accusations in real life but this is a story and that being the first thing the ghost thought of is what makes it funny.

There is another instance where a couple want to reincarnate together but the City God of the Underworld informed them that they watched too much dramas and that it didn't work like that. Eventually, he agreed to allow them to reincarnage together as animals. Specifically pandas. All because they had done good deeds in their life and the fact that he was getting creeped out by their lovey-dovey acts.

Another example is her Grandpa nonchalantly telling her parents that he used to send her out alone on New Years to exorcise evil spirits. Really, anything with the Grandpa is just hilarious (except that one part), even his pursuit of his love in the Underworld was funny.

She's got a special physique that prevents her from being harmed by evil energy but it also lets her absorb the energy. Which she uses to seal up the ML's evil spirit. And yes, it is by kissing at several points. It's also this kissing that makes her realize she likes the ML as the pervy ghost tells her that if she "kisses someone and can still picture kissing them again, that it's love".

Turns out they have both been reincarnated repeatedly over thousands of years. They would find each other and try to solve the ML's problem but he would always die young (before 30 was mentioned at one point in the translation) and the process would then restart. Which is made even more depressing when we learn

The MC was destined to reincarnate into a wonderful life after their initial life but meeting him had changed her fate. The new fate was a short life and then her soul being scattered. Thinking he could prevent it, he broke up with her but that failed.

She was a princess and chose to become a corrupted being (Drought Demon) because her people were slaughtered. To save her, he sealed her power into himself which killed him and set him on the reincarnation loop.

Yes, even when they already kissed twice which is more like CPR. There’s no dokidoki.

There was a scene where someone had pointed out how fed up they were with the whole, you live, I live; you die, I die/Romeo-Juliet kind of braindead romance.

Ironically the main couple's relationship is exactly that.

They went from hanging out casually at home (at times not even in the same room) to making out, playing the suspension bridge effect card here and there and boom, ML loves her so much he can't let go and has to marry her, they'd risk their lives for each other.

The narrow options for ML def. Don't help MC's case:

She's the only female who's not part of his family and can deal with his physique. Otherwise, there was no way for him to get to know other women or interact with other women of suitable age. ML believed for the longest time he'd be a short-lived single dog and he wasn't about to sacrifice someone for his solitude.

Conveniently, a lively, outgoing, and evil-spirit-aura-immune girl of age appears right before the lonely, sickly martyr.

Entangling their previous lifetimes into this whole situation when they barely had any proper romantic progress other than making out and spending a lot of time under a roof, it's a little bit of a fast shot, to say the least.

Nice for the supernatural plot, yes, awful for the romantic side. Not to mention the darn plot twist of the main plot is based off of a late 90s blockbuster. Kinda lazy.