When Seara was a young girl, she pledged her love to the older Shuhei Seto. In a whimsical tone, Shuhei promised he'd wait for her to grow up to be a beautiful woman, and would then give her love a chance. Now, four years later and through a twist of fate, sixteen year old Seara is living with Shuhei, his sister Koharu, and their parents, though Seara's identity is unknown and unremembered by her longtime love. With steep competition for his heart as well as a lacking chest size, Seara must do everything in her power to win the heart of the man she loves!