Bokura no Koi wa Shi ni Itaru Yamai no Youde, Our Despair-Like Love, Our Love is as Painful as Reaching Death, Our Love is Like Sickness onto Death, Наша любовь, 我们的爱如绝症一般, 無可救藥的愛情
As children, twins Umi and Sora became acquainted with a four-year old Beniko. Years later, Umi has moved away, and Sora confessed to Beniko that he'll propose to her when she turns 18. But when Sora dies in a traffic accident, why does Umi appear before Beniko looking and acting just like Sora?