akujiki_musume_conchita_(vocaloid)
A song for Meiko (vocaloid) ft. Rin/Len by mothy/Akuno-P (悪ノP), with PV illustrated by Ichi ka. It's part of the Seven Deadly Sins Series, depicting Gluttony.
It details the story of Banica Conchita, duchess of Beelzenia who once was a prestigious gourmet who devolved his tastes into looking for the most gruesome and repugnant dishes, eventually falling into the cannibalism, eating her whole staff and finally devouring herself.
English: Evil Food Eater Conchita (Beelzebub Party)
See also
Aku no Taizai Series
•• Glassred no Shouzou (vocaloid)- Akujiki Musume Conchita