Saint Agunesu No Junkokoro Hana Shimai No Jikenbo (Seikaisha FICTIONS) [Light Novel]

[Machine Translation] Maria Kamisato is transferred to the middle school of Seika Jogakuin, and she and Yukino Shiraoka, a high school student whom everyone admires, become sisters for the first time - flower sisters. At St. Agnes, the boarding house of the academy, there is a "flower sister system" in which a junior high school student called Wakaba and a senior high school student called Naruhana become roommates. A holy statue that walks around late at night, letters that have been replaced, a dismantled teddy bear.... Yukino deduces the mysterious mysteries that Mariya encounters, and even unravels her lonely heart - a story of discovering the sparkling emotions and bonds between girls is now in full bloom.

聖花女学院の中等部に編入した神里万莉愛は、みなの憧れの高等部生・白丘雪乃と仮初めの姉妹―花姉妹になる。学院の寄宿舎セント・アグネスには、若葉と呼ばれる中等部生と成花と呼ばれる高等部生がルームメイトとなる、花姉妹制度が設けられていた。深夜歩き出す聖像、入れ替わった手紙、解体されたテディベア...。万莉愛が遭遇する不思議な謎を雪乃は推理し、孤独に閉ざされた彼女の心さえ解いてゆく―少女たちの煌めく感情と絆を見つける物語が、ここに開花する。