TokiSora and Password is 0 are both top notch songs! I am always a fan of the faster paced songs so Password is 0 is my preference, however I will agree that TokiSora is a great break from the EDM. (much like Egao was even though people didnt really like it) The song's lyrics are hauntingly beautiful. Also I think the song is very Platinum Era and thats probably part of why everyone likes it so much.
That said I am a little disappointed in the PV previews. Both seem good, with TokiSora being quite a bit better that Password is O (although the computer effects are cool), but neither are at the level of quality that Wagamama's PV was. They just could have done so much more in my opinion. But hey its so far just a preview, and maybe the best parts of the PVs are yet to be seen.
Also Riho is really rocking it in Password is 0~!
A solid single nonetheless. I'm hoping that we have another jump in sales. *crossing fingers*