The Flower Princess of Sylph

In the Land of Wind, in the imperial capital of Ventfleur, Princess Natalia is enthroned after the loss of her family.

The princess, idolized by her people as a "child of the spirits", only has her family's royal blade to assuage her grief. And in her mourning, she's approached by the cheery and elusive Sister Sara... who declares to stay at the princess' side as her duty, as a sister of the cloth. Or is she after something more...?

So begins the fantasy yuri adventure of a lonesome princess and meddlesome nun!

Note: Was commercially serialized up until chapter 17 when it was cancelled. The author decided to continue the manga via self-publishing.
Here are the JP version, EN version.