S.A: Special A
Have you ever known someone who was better than you at everything you did? Hikari does. She's known Kei since they were both six years old and he's surpassed her at everything. Now they are the top two students in an extremely prestigious high school, with Kei holding firmly to that number one position, and Hikari is still determined to beat him, no matter what it takes.
Volume 1 contains one-shot: Incomplete Chorus
Volume 8 contains Special Short - about what Kei was like as a child and when he and Hikari first met.
Volume 9 contains Special Short - about when Yuhiro meets Sakura.
Volume 11 contains one-shot: Food Paradise