Toki

Chapter 27: Necklace 2
Chapter 26: Necklace 1
Chapter 28: Necklace 3
Chapter 26: Necklace 1
Chapter 28: Necklace 3
A Saki spin-off series. It follows the characters Toki Onjouji, Ryuuka Shimizudani and other girls from Osaka during their elementary and middle school years.