Identify 2D game where you play as a girl trying to get rid of succubi?

[Red_Line]

I remember a few key scenes of the game, like a big mansion, fighting a literal cow succubus. The MC might've actually been a futa? Could be wrong. I remember your "rival" was blonde, and often got fucked because reasons. Forgot the name of it though, remember playing it to completion (then I lost the save file after my computer broke)

Thanks in advance for the help.

 

[Zidan49]

Eileen curse of futanari succubus