Romance! A crazy, overprotective brother! And...spies?! Taiyo Asano has been on his own ever since his parents died. The only one who seems to care for him is his childhood friend and classmate, Mutsumi Yozakura. But Mutsumi has a secret--she is the head of a family of spies! The attack on the Tanpopo base begins! The Yozakura family quickly discovers the enemy's top fighters--the Nijibana Rainbow Flowers--all have powers bestowed upon them by the Cherry Blossom Leaf Hazakura serum, and they are almost exactly like the Yozakura family's Bloomings! Shinzo clashes with Kurosawa while Shion and Kengo tackle Cha-Cha and Aonuma. Meanwhile, Kawashita spares no effort in setting up his mysterious Seed-Sowing Project.