Ame no Majo to Hai Koushaku - Shiro Bara ga Sakanai Grauall-tei no Himitsu

A witch only becomes truly grown once she learns love.” One hundred years ago, the Kingdom of Astrit was founded with the support of four witches who stood beside its first king. Lil, the Witch of Rain, lost her foster parent—the former Witch of Rain, Alexia—and has been living alone ever since. Then one day, Leorart, the man known as the “Ashen Duke,” appears before her…!? A story that weaves together past and present—revealing the secrets of witches and a tale of love.