I don't know if anyone mentioned this, but the title has the word "Saudade," which is a Portuguese word with no direct translation to english but is described as "the joy of grief" a melancholy feeling of nostalgia, often used to say you miss something or someone. Read somewhere that yearning and longing are similar, but I don't think it hits even closer to the original meaning, cause is more something you like to remember but it also pains you to not having anymore.
I expect to be part of the theme of this manga. really looking foward to the angst