I just binged, straight through with only a break for sleep, an amazing manhwa - See You in My 19th Life.
Jieum Ban has an extraordinary ability: she can remember the memories of all her past lives. After her previous life is cut short by a tragic accident, she sets out to reconnect with the people of her past life in her current one. Will memories of her 18th life sabotage romance in her 19th? Or will love endure across different lives?
The thing is that that's the bulk of the story for 30-some chapters, then it suddenly pulls together some little bits and pieces that have been scattered here and there and opens up to reveal an entirely new, additional plot line. And that's not the last time it does that - IIRC, there are at least three different points throughout the story where it peels back one layer of story and reveals an entirely new one hidden underneath. It's just very well done.
Additionally, the characters are well-written and there's a lot of satisfying growth through the course of the story. And that's done in much the same way - a character might be introduced and come off as very shallow and one-dimensional, then it slowly peels back the layers so you can see deeper and deeper into them and discover that it's not that they're one-dimensional - not even close. It's that they (like virtually all of us) have significant parts of their selves hidden away or guarded by walls. There's much more there - they just don't let most people see it.
And it's a complete and satisfying story, and I strongly recommend it.