Narutaru: Mukuro Naru Hoshi Tama Taru Ko

Other name: Shadow Star Narutaru, なるたる ～骸なる星・珠たる子～

Description: During her summer holiday at her grandparents house Tamai Shiina, a young and cheerful schoolgirl, meets a strange looking creature. They befriend each other and Shiina names it ‘Hoshimaru: The Round Star.’ When Shiina returns home after the summer to go back to school, she starts meeting other kids that also have befriended a strange creature like Hoshimaru. But she soon finds out that not all these creatures and their masters are as friendly as Hoshimaru.