Was sorting through my list of favorites in NICO when I saw this video. And I found it in Youtube too.
It’s quite an old video already but I like its story. Really matches with the lyrics of the song. The rough story was that Alice got married with Marisa but she is feeling sad. Why? The truth reveals that Marisa is actually a puppet. Marisa died back when Alice is still a Loli(the PC-98 Alice), and then, Alice used Marisa’s corpse and converted her into a puppet. The ending is nice. So beautiful.
Song used was 砂鉄の国のアリス from the album 宴~utage~ by 凋叶棕.