Kindergarten WARS Vol 3

From the Yen Press edition

Natasha, Kindergarten Noir’s newest adversary, is a ruthless assassin who was hired to terminate one of the children. But it isn’t the bounty she’s interested in—it’s dueling the legendary “Witch.” As the battle rages on, Rita seems to have truly met her match…With everything Rita holds dear in grave danger, a side of her she thought she left behind emerges…

Source: Yen Press