Senpai teach me about love

Shirayuki, Alice goes to a high school that teaches one how to become a princess. Once you learn how to act like a lady you can be the next Briar Rose, alongside your prince entitled Royal road. When Alice was a little girl, she made a promise with a boy who told her he would become her prince and lead her to become a princess. However, she's forgotten his name and what he looks like, but she won't give up until she finds her prince and becomes the next Briar Rose! At the school she meets two ...