If you know Koooon Soft's release history from the last 2 decades, I don't need to explain anything.
If you don't, well, this game just like all the other ones from the same devs is a simple linear 2D platformer where you either fight or avoid enemies on your path by jumping above them.
What makes these games so special? The very messed up, high quality animated H-scenes. There's H-scenes for enemies, there's a few H-scenes for gangbang scenes, there's game over H-scenes.
Can you watch porn without losing on purpose? Well, if you clear the levels you get to unlock the gallery and watch all of the scenes you may have missed. Gameplay-wise trying to lose on purpose is not a winning strategy because with every H-scene you take more and more damage until eventually you just run out of health.
After you finish the levels will you ever play them again? Nope, but you will be here for the gallery certainly.