Bokura no Koi wa Shi ni Itaru Yamai no You de

Baka description:
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?
Have fun!

Other names:

僕らの恋は死にいたる病のようで
我们的爱如绝症一般
無可救藥的愛情
Bokura no Koi wa Shi ni Itaru Yamai no Youde
Our Love is as Painful as Reaching Death