Duay Rang Athitarn (2010)

Sataya Tis Tarn is similar to Duay Rang Athitarn:
-Fobidden love in the past life
-ML or FL killed
-ML or FL swear to reborn in a better life
-ML or FL remembered past life

1. Two lifetimes for FL
2. There is a 20ish years age gap.
3. The FL reincarnates after her death as a stronger person with magic powers.
4. Both have a mystery to find out who killed her in the past life.
5. Both have ML being faithful to her since her death in her past life.

Duay Rang Athitarn is similar to Klin Kasalong because the female lead who loves the same man as her half sister/twin.
She then was jailed and starved to death before her dead body was discovered by the male lead.
She then wished to get revenge on all the people who made her suffer in the past life.