Ookami Kodomo no Ame to Yuki

A 19-year-old college student named Hana meets and marries a wolf man, eventually giving birth to two children with wolf traits. The older child, Yuki, is born during snowfall, and the younger, Ame, during rain. The family lives discreetly in a city, hiding the children's true nature. After the wolf man's sudden death, Hana relocates to a remote rural town to protect her children.