kaikaikaikaito1998, otherwise known as kkk, is a Black Midi creator. His most famous MIDI is "中学生と小学生がネクロファンタジアの楽譜を真黒にしてみた", which got over 1 million views on YouTube. This video is basically a remix of Necrofantasia. He also created many other midis, like Bad Apple!! and Death Waltz.
kaikaikaikaito1998 is an original blacker which blacked: Bad apple, Death waltz, Necrofantasia and many more.