Kindergarten WARS Vol 4

From the Yen Press edition

In a bid to capture Lyla, an exceptional little girl shrouded in secrecy, a whole squad of assassins has initiated an all-out war on Kindergarten Noir. Their leader? None other than Rita’s own twin brother, Leo! When the Dandelion class teams up with the hyper-competent—or maybe just incredibly unhinged— teachers from the Chrysanthemum class, can their combined efforts keep the enemy at bay?

Source: Yen Press