Kareshi Kanojo no Jijou, Himouto! Umaru-chan Recommendations
Both have conceited main character's who are completely different people at home and inside school. At home they have their selfish side while at school they are Mrs. Popularity.
Both are slice of life, comedy and school animes that focuses on the female main character. And both female characters are completely different when they're in school and when they're home, they play the perfect student in the school while actually they're selfish and lazy at home.
However, Himouto! Umaru-chan has little to no romance and drama, while Kareshi Kanojo no Jijou is focused on a romance relationship and gets really dramatic eventually.