夕闇ノ殺メ唄 (Yuuyami no Ayame Uta)

Background
The song was uploaded to Nico Nico Douga on June 4th, 2011 gaining over 190,000 in viewcount.

The song is based in oriental times, revolving around a woman and her lover. The woman's lover becomes unfaithful and commits adultery. The woman now devastated, stabs her lover to death so that he may be hers forever.