Umaru is a renowned beautiful 16-year-old girl, living with her elder brother Taihei. She's a perfect little sister: Popular, smart, kind-hearted, everybody admires her. So who would believe Umaru keeps a certain secret? Sleeping, gaming, watching TV, eating junk food, drinking cola… that's almost all she does at home, leaving all the housework to her brother.

(Source: Crunchyroll, edited)