I Grant You Revenge

Eirene’s second life started for revenge.
It begins by taking the fiancee, Clive, from Aishe, whom she thought was her younger sister.
But they ended up helping each other.
“It may be difficult, but please love me.”
“I’m glad my partner isn’t boring.”
Eirene and Clive approached each other with different purposes.
What awaits them at the end?