When he was a child, Keiji (Mayumi Moeyuki) always followed his brother Issei (his brother's name), and his brother's classmate Hikari (Akita Shiori) was Keiji's crush.
Due to his parents' job transfer, Keiji had to move and was unable to express his feelings to Himari.Time passed and Keiji became a high school student.One day, he learned that his brother's class was going to hold a class reunion, and he thought: “Maybe he can see Sunflowers!” then decided to attend the class reunion in place of his brother who planned to be absent.
Using his brother's identity all his life, he successfully attended the class reunion and reunited with Sunflower.
However, as his younger brother Keiji, can he convey his love to Himari?