Uhm, the concept is good and the graphics are alright, but the dialogue looks like it was written by a 12 year old. No offense, it simply wasn't that interesting. There was no real sexual tension or flirting, the main character was spineless and reactive and didn't really do anything the whole game.. I don't even see how Hanako could fall for him lol.
The story and characters were too one-dimensional, Hanako is the misunderstood ghoul who is actually a good person and MC is the nice guy who goes along with everything. There's no depth. Work on your writing! Other than that, good job on making the game. It was interesting enough to get me all the way to the end.