The elf slave Feinne, why did she sell out her own country? [RPG][English]

You play as Feinne a half elf half human girl which can transform into a more powerful version of herself (she goes blonde).
The game has many routes available.
You can also shape her body to your liking while playing. 

In the past, the chosen children of the human race won the battle, and elves became “slaves” because of it.

In this world, elves have no human rights.
Elves are just “sex slaves” to satisfy the sexual desires of humans.

The new chosen child of the human race is named Feinne.
However, she is half-human half-elf.
A new war between the chosen children of all races will be held.