23 year old Japanese voice actress Aimi Tanaka performed this cute & cuddling song called Kakushinteki Metamorphose which is the opening theme for Himōto! Umaru-Chan. A 12-episode anime based on the Japanese manga by Sankaku Head which 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, & a lot of talent. Once she gets home, however, she reverts into a layabout who spends her time lying around, playing video games, & constantly depending on her older brother, much to Taihei's dismay. Over the course of the series, Umaru's alternative personalities help her become friends with her female classmates Kirie Motoba, who has a reputation of glaring at people; & Sylphynford Tachibana, a competitive school rival; both of whom turn out to be little sisters of Taihei's coworkers.