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http://www.mangago.zone/read-manga/soryanaize_darling/
Has kind of similar plot, is it this one?
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Isn't it that the girl was in love with the boy who died, they received the letters from the future? it's shown in the past and they tried to avoid the boy to commit suicide ... I think the mother committed suicide or something like that , and they girl and the other boy in the future got married and got a kid?
Anyway still don't remember the name if it is ( ̄ε(# ̄)Σ ╥_╥
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That is called orange right?
Years ago, I read a manga of three kids: two boys and a girl. The girl was in love with one of them, but he died in an accident (I believe). Later, through some kind of portal the other two could travel in time and so avert the death of the boy. Unfortunately, I don't remember all of the story and I can't seem to find it. Has anyone ever read this manga and still remembers which one it is?