Released first as an eroge - with a clean ver. later - it has been adapted in to 2 anime series, 5 light novel series, 3 audio-dramas and 2 manga series. Contrary to general belief, it's not a shoujo or 'moé' title, but a seinen.
There is seemingly no 'perfect' way to truly say goodbye. So I gathered a bunch of them!
Submissions can take several hours to be approved.