Himouto! Umaru-chan manga volume 8 features story and art by Sankakuhead.

Umaru finds her comfy himouto life thrown for a loop when Hikari, a smart, reclusive girl (and Kanau’s little sister) takes an interest in her big brother/personal slave, Taihei. Hikari even manages to worm her way into Umaru and Taihei’s precious bread days! Can Umaru keep Taihei all to herself, or is sharing written in the stars?