Manga by author Sankaku Head - Status ongoing

This is a very interesting and relaxing manga. A story follows Umaru-chan(16yo), a renowned beautiful girl in the town. A perfect little sister with a very kind heart, high scores and popularity at school, who everybody admires... or at least that's what people believe, but once she walks in her room, she becomes... Two Faced Litter Sister!!!!!!!Here is the Spin-Off:Himouto! Umaru-chan S

Spin-off of Himouto! Umaru-chan about Umaru's friend, Ebina.

Sami-chan, who lives alone with her dad, has inherited her mom's silver hair and perfectly round eyes, making her an incredibly adorable daughter. However, this daughter has a secret. When she feels lonely, horns sprout from her head. She's a "half-demon" born from a devil...! Would having a daughter like this bring happiness!? Or... A heartwarming comedy filled with the bond between father and daughter?