An unofficial remake of the original Saya no Uta. The plot has been greatly expanded and re-envisioned. The number of endings has been increased to 12, new routes have been added, characters have been supplemented, and one new character has been added.
Many bugs have been fixed, full Russian audio localization was added and menus and some art of the original game have been upscaled and redrawn to fit 16:9 resolution (Most of the CGs were cropped), among other general improvements.
This visual novel also includes the original Saya no Uta (with some cropped and some smushed backgrounds to match 16:9 and Russian voice acting) and an unfinished demo of a sequel story called "Saya no Uta 2". It was going to tell the story of what happened immediately following the end of original novel, showing how the world changed and what happened to the characters and to humanity.