Project, Six-string Alice, Kanon Wakeshima, Voice

Horizon and xandria songs are good choices! Besides, it's not good

Apples are also quite black.

Representative song: lonely creation, finally

Instantly, baptism, の Queen kabukicho, Saint Field, dark kingdom, rotten girl abnormal romantic, still.

Doll, save

my

Life, bad

apple

The theme songs of "Empty Realm" are all very good. You can drag "seventh" if you want.

Paradise, the whole album.

This is the first song "Overlooking the scenery" of the theme song "oblivious"

My sister is holding a doll

The tune of this song uses ghost sounds many times, which should meet your requirements, and the lyrics are rather dark.

repent

Black Sunday

The thirteenth eye

These three songs are the three forbidden songs in the world. Although it is not the original song, personally, I think the tune is still very black.

Night party beauty