At the time I obtained Cytus II, it was free for a limited time and I guess that I obtained the original Cytus for free from the official app store at the time. Cytus II was already at version 2.x at the time I obtained it, hence the animated opening and the new character available with no charge. There will be story for each character including the character conversation and instant messenging elements where you can unlock songs as you level up the characters. Needless to say, this is tedious and grindy like trying to unlock all the story portions but grind-iness obviously doesn't count as a flaw.
The gameplay in Cytus II has additional notes and you're introduced to them on the first play via the Tutorial screen which doesn't explain anything like it doesn't make any sense unless you had played Cytus before, seen the gameplay videos or both. For me, I knew what to do as I had experience in playing the original Cytus but there should be explanation on how the gameplay works in the first place. The amount of experience points depends on how well you do at the end of the song and getting the Million Master will give you the highest amount you can get.
Then, there's a problem with the game's age rating due to the story. Things get brutal on further parts of the story and one of the fictional states called Node 03 is a dangerous place as there are various criminal organizations there. The one performing as PAFF is not the original person you know of but rather, a replacement that took over as PAFF and that original person. What this means is that the car accident occurred on the car the original person named Aroma White, was in and then someone was dragged in to the hospital and then experimented on with memory transfer from Aroma's brain to the victim's which is painful and brutal, hence having memories of two persons. The worse thing is that, anyone can be taken away for such evil experiment and then look identical to the other person, no wonder the case of missing person is still on-going and the person who got caught for looking for PAFF was actually a childhood friend of that victim who took over as PAFF entirely.
Robo-Head and Nora have terrible pasts and according to the final conversation or OS Log from Nora's story, she had made a supreme policy on him against returning to Node 03 and that he can have better time at Node 08. Why does he come back to look for her like it's beyond me?
One surprise encounter is that Neko has found Aroma White wandering around in the street but then, the clues still have yet to be found to the on-going situations. The true culprit behind the Aesir hacking incidents still has yet to be found and the replacement Aroma is looking for answers on who she is and I don't know what the other characters like Joe, Connor, Xenon and Cherry are up to.
The story has tons of momentum and an animated or a live action drama/movie based on this game may or may not be good idea for me it looks like it has lesser things to do with the game other than its story. Plus, the story may remind me of the foreign dramas I had watched but you may need to keep in mind that it is incomplete at this moment and there will be future updates to the game.