i play the game and watch 1 ep of this It seems that the anime is either spin off or sequel from the game This series is actually a direct sequel to the OG but it's in the game version. if you want full experience and more connection to the OG . either play the game or watch the playthru and probably watch this anime after that.I dont think you can even watch the anime without watching/playing the game 1st

since they don't explain anything

however after u r done with the game i think this Animation is a nice cherry on top for sure