To me this feels like a perfect post-ending story from the author. I don't know why, maybe it's the fact that Shizuku has managed to live a full life so far, proving all of Kaori's efforts weren't in vain, but that she still fills her life with thoughts of her, proving that she still lives on in the minds of others, but for whatever reason reading this the night after I finished The Summer You Were There has brought me a great sense of peace. That's a big step up from bawling openly in the shower until my eyes were red and then furiously imagining Shizuku eventually dying of old age and getting to meet Kaori in the afterlife where they both get married etc. etc. until I fell asleep like I did last night. Anyways. Wonderful after-story.