Natrix

It was an amazing drama. The story is overall really touching. Even though I kind of saw the ending coming, it doesn't change my love for this drama.
The cast is great (I especially loved the one playing Kang Jihoon's best friend).
I wouldn't necessarily recommend to someone searching for a cute romance or just for a BL, because even if there are romance elements, the plot still centers around the fantasy part (Shin Jaewoo's time travel)
Overall, I wouldn't rewatch, but I definitely recommend !