Boku no Mana Musume

Synopsis

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? (Source: Big Comics, translated)