Saint Bloom Gakuen: 12 Tsuki no Hanakishi

Summary

My prince, do my feelings reach you-? This is a world where magic exists. People with the ability to use magic are gathered together at a magic academy city where there are 12 special boys called "flower knights." All of the girls admire them and have feelings for them. This is a mysterious story of 12 months of language of flowers. Now love is beginning. (Source: Famitsu)