3girls, apron, bell, blue hair, bow, cape, checkered clothes, checkered kimono, comic, cover, cover page, doujin cover, drill hair, fins, hair bell, hair bow, hair ornament, head fins, holding, holding knife, japanese clothes, kimono, knife, long sleeves, mermaid, monster girl, multiple girls, orange hair, red hair, shirt, short hair, twintails, two side up