Shiro: sunflower – adoration, “I only have eyes for you.”
Kuroh: marguerite – faith, true love, love fortune-telling.
Misaki: lily of the valley – purity, humility, happiness comes again.
Saruhiko: forget-me-not – true love, “forget me not.”
Reisi: blue rose – dream come true, impossibility, miracle, god’s blessings.
Mikoto: red rose – affection, beauty, passion, ardent love, “I love you.”
source: official twitter | language of flowers in Japan