pencil e story: Kozo Yohei

Fantasy series dedicated to a bounty hunter in a world full of magical creatures.
Phaia is a bounty hunter at the beginning of her career.
She travels to a remote part of the kingdom to eliminate a demonic Archon and collect the bounty set by the king.
After easily dispatching his orcs, Phaia directly encounters the archon.
The demon uses a spell to turn her on, then they have sex to give her a "soft death".
However, Phaia proves to be more resistant than expected and after 230 orgasms the demon succumbs!