Manga by Sankakuhead.
The series follows Umaru Doma, a high school girl who lives with her older brother Taihei, At school Umaru appears to be the ideal student with good looks, top grades, and a lot of talent. Once she gets home, however, she reverts into a layabout who spends her time lying around, playing video games, and constantly depending on her older brother, much to Taihei's dismay.
