Onna Senshi Kureha ~Toride no Goblin~

Kureha has been asked to vanquish the goblin who resides in a fortress near her village.
She immediately sets out to toward the fortress where her target lays in wait, however...
Kureha is blissfully unaware of the twisted sexual drama that is about to take place in that very fortress...!

[From DLsite English]