Kiss in the Blue

Kiss in the Blue is a manga series by Kaho Miyasaka. It was serialized in Sho-Comi in 1997, with 4 volumes total.

This is a very dark and angst work, much more so than Miyasaka's other works. Saeki Chise has no recollection of the summer of three years ago. Whenever she feels as though her memories might be returning, her head begins to ache and Chise stops trying to remember. That's when Tamiya appears before her. He has a familiar face and photographs from the traumatic time that Chise's mind has suppressed. He uses the photos to blackmail her into becoming his woman...but then Chise is saved from Tamiya by Katsuragi Kaoru, the biggest delinquent in class! Chise begins to fall for Kaoru, but his role in this situation is not as innocent as Chise at first believes
 * Manga Archive, Kiss in the Blue