As you very likely already get from teh title - this game is a hnetai parody on the famous videogame seris"Castlevania"! But instead of barve warrior Balmont you will be playing as blue unshaved rabbit. As for the gameplay it is pretty similar to the original game series - you will need to get through old castle and try to battle or avoid multiple enemies, search for special objects and treasures and try to... not get fucked till death! Yeah, you heard taht right - main hero might be a rabbit but even he can't fuck eternally - it might cost him health at some point! And the problem is that pretty each and every enemy you will meet on your path to glory will probably try drain all of your life energy by fuck you! And one more thing - since the night will turn to day so will change your hero!
The idea seems simple - assist one lovely gal to go out from the space. Yet ofcourse it wont be that simple when you will start playing. The spaces of old castle are full of many traps (and not the adorable ones however the dangerous ones) and monsters which you will have to avert and escape. And ofcourse time after time our heroine will get fucked up... only in this game it will be rather actually! So loosing wont be that unfortunate however sometimes even rather interesting!