The song is released full version during AK JP 4th anniversary livestream: https://youtu.be/CunLZ5BeaJY
Lullabye Vocal Version Only:
https://www.youtube.com/watch?v=CY1-2C4cwks
Lullabye In-Game + Frostnova version Remix (Russian + Japanese):
https://www.youtube.com/watch?v=UfRZcVs6MvI
#lullabye #frostnova #arknights