OHHH I'm actually making one in around ten years or so! (LOL In a long time.)
It's called Kitsune no tobo e (The howl of a fox) and it's genres are basically:
shoujo
mystery
supernatural
romance (more on shoujo)
a bit of tragedy
maybe drama
I'm not sure; I haven't really thought of it.
It's about a girl named Lyall who's parents got killed by a nine tailed fox. Her brother and she decides to get revenge on whom she calls "Kokkuri-san;" by becoming Kokkuri-san (human form) and taking requests from students to kill people. She believes that if she continues killing, Kokkuri-san might take an interest in her and show up.
Then several months later after a rumor has started about Kokkuri-san and the mass murders, an undercover detective named Levi transfers to her school to catch him. His looks are great, but to other students, he acts like a total otaku to avoid trouble. In fact, he is from a rich family of famous detectives for centuries.
Lyall and Levi come to like each other.
Spoiler Alert! Click to show or hide
Now because I get overly excited about my manga, I'll give some SPOILERS. DON'T LOOK IF YOU DON'T LIKE SPOILERS AND MIGHT LIKE THIS MANGA I'M MAKING!!
The tragedy part is around the ending where Lyall is chased around by Levi all night one night and comes to school half-asleep. While on patrol for any 'requests' (I won't explain this system. It's complicated), she falls asleep on her usual resting spot-- with her Kokkuri-san disguise. Levi finds this and prepares to kill her, but finds out that it's in fact Lyall, who he likes. Lyall wakes up and Levi is petrified; but Levi's "bodyguards" show up and end up taking Lyall into custody using force (and because she is a mass murderer, she was blindfolded and tied up to ensure everyone else's safety. She was to be executed, but Levi doesn't like the idea of having her executed by cruel ways. So he goes to "visit" Lyall; and tells her that he will kill her, then kill himself because he knows that what he will be doing is a crime. He confesses to her, shoots her, and while Lyall is dying, she also tells him that she likes him, and cries-- then dies smiling. Levi is devastated at her last words, and pretty much keeps his word; and also dies along with her, by her side. But I didn't like how this was coming to be, so I decided to have Kokkuri-san, who has been watching them as a secret classmate (who transfers later on), feels pity and sympathy for their forbidden love between a murderer and a detective (because he (yes, it's a he, but kitsunes take on a female form) also had a forbidden love, and his lover got killed so he raged and killed Lyall's parents) and Kokkuri-san tears off 1000 years of his life by giving them one of his tails (each tail is gained by living 1000 years with an exception of the first one) and grants them their wish to be able to reborn as students who are able to love each other. The last pages will have them in high school, they fall in love at first sight; and Lyall accidentally calls him Levi, but doesn't know why she did because his name isn't Levi anymore.
I'm really excited to make this project into a manga!
I've gathered ideas for over two years, and I've been writing some rough drafts.
I really really hope I can someday make this a manga.
And I hope no one steals my idea xDD