Hana to Akuma花と悪魔; 花与恶魔; 花與惡魔; Blomsten og Demonen; Blossom and Devil; De Bloem en de Duivel; Devil with Flower; Flower and Devil; Hoa và ác ma; La Fleur du démon (French); La Flor y El Demonio; The Flower and the Demon

From Mangaupdates: 15-years-ago Vivi, the demon, decided to leave the demon realm and come to the human world. There he found an abandoned baby and on a whim decided to keep it. Since then he lives together with Hana... but having a 14 year-old girl around you, is it really that simple?