[DeepL Translation - needs review] The private Lillian Girls' Academy is home to a group of shepherdesses bred pure in a greenhouse. To ensure orderly school life, the upper school has a system of "sisters" in place. After pledging to become sisters through a ceremony of exchanging rosarios, the senior sister takes charge of the junior sister.
When Yumi went to high school and didn't have an older sister yet, Sachiko, the "Rosa Kinensis en bouton" (Red Rose Bud) she admired, suddenly declare...
