From Aerandria Scans:
Evilice and Sin are shadowy but attractive characters who have lived for their collections. Evilice collects items that are cursed, and Sin collects ones that were used for murder. Though they compete for the same items most of the time, they have the opposite feelings towards only one item: an old doll. It is a cursed woman who Evilice loved and ruined, and who Sin is jealous of. With stories of sinister items, their secrets spread!