夕闇ノ殺メ唄 (Yuuyami no Ayame Uta)

Background
The song gained over 200,000 in viewcount, when first uploaded.

The song is based in ancient times, revolving around a woman and her childhood friend. The woman and her childhood friend make a promise to wed, but when they become adults, the childhood friend falls in love with another. Enraged, she kills her childhood friend so that he may be hers forever.

It's sequel is Guren Hyakkiyakou.

This song is featured in the compilation album Karakuri Man'yoshu, as well as EXIT TUNES' Vocalosensation and their MEIKO only compilation Meikonic.