Alice 19th, Vol. 1: Lotis Master

Alice was a typical young girl--hopelessly in love and bored, until she follows a magical rabbit that literally changes the course of her life.
Alice Seno seems like a normal girl in high school. She's a bit shy, she's got a crush on a boy named Kyô, and she's got an older sister who is more popular than she is...pretty normal stuff, until Alice has an encounter with a mysterious and magical rabbit girl that changes the course of her life, and Alice is introduced to the sublime power of the Lotis Words.

Alice Seno is a seemingly shy and meek girl who always seems to be outshined by her older sister Mayura. One day, Alice has an encounter with a mysterious and magical rabbit girl, and her life is turned upside down. Alice discovers that certain words have power, and that she has the potential to be master of a set of sublimely powerful words called the Lotis Words. But power always comes with a price, and the price may turn out to be Alice's sister Mayura...