A war rages on, its end unknown, covering the world in despair. At a military field hospital, a group of soldiers bring in one of their own, wounded by a large, vicious, bite-like wound, along with a large box. The soldiers are visibly shaken. Suddenly, an enigmatic man appears. As he starts to tell them the legend of the Lance of Longinus, their night of unimaginable terror begins.
며칠 뒤 결혼식을 올릴 예비 신랑인 칸자키는 사체가 훼손된 채 발견되는 엽기적인 연쇄살인의 담당형사이다. 그러나 결혼식 당일 약혼자인 미나가 연쇄살인의 희생자로 발견되자 그는 범인에 대한 복수를 다짐한다. 한편 자신이 죽었다는 사실을 깨닫지 못한 미나는 저승의 문 앞에서 다시 현세로 돌아온다. 부검실에 누워 있는 자신의 시신 앞에서 분노를 참지 못하는 칸자키를 발견한 미나는 그를 말리려 한다. 그러나 그 때, 그녀의 눈에 자신을 죽였다고 생각되는 사람의 사진이 비치는데...
In the last chapter of the Refrain Blue series, the bond between Yoshihiro Matsunaga and Nao Morisawa grows stronger, while Yoshihiro finally finds out the identify of the mysterious girl from the first chapter.
The second chapter in the Refrain Blue series focuses on Nao Morisawa and the events that happened at the summer camp last year, with her and Yoshihiro Matsunaga both unable to let go of feelings of the past.
The first chapter of the Refrain Blue series, tells about the recollection of Yoshihiro's past about various events of summer school, of the fate where encounter and separation are interwoven with each other, as Yoshiro and Matsunaga will pass the Toyo Gakuen and will arrive at summer school at seashore. A mysterious girl smiles as she watches Yoshiro who stands still at the seashore dusk.
