Hinata Ema grew up alone with her father and her pet Juli. She always dreamed of being part of a big family and this dream comes true as her father marries. Suddenly Ema has thirteen new brothers who demand her attention -- and some of them are interested in her not only as the new family member.
Both anime have a reverse harem, with a female protagonist surrounded by many men who fall for her. In both, the girl is sent to live in a new house in which many brothers live, and soon everyone starts to like her.