itch.io

Scroll down a bit. For me, try out a game called hachina. It’s on dlsite

Hailey's Adventure is kinda similar 

Here are some of my recommendations for side scroll fighter/defeat sex:

Pure Onyx
Ghost Hunter Vena
Zetria
Captivity
Future Fragments
Escape Dungeon 1/2/3
Udonge in Interspecies Cave
ThornSin
Alien Quest Eve
Night of Revenge
Parasite in city
Castle of temptation