Years ago I remember playing a game with a male and female character, I remember being able to switch between the 2 and they each had unique skills to use. Whichever one you didnt control would follow behind you and could be raped in animated sprite sex if they touched an enemy. I remember a beetle enemy and there was a level with like futa doctors in a sort of research station, your character gets trapped in those glass suspended animation tubes where you usually float inside the water.