New single already leaked... Yeah, exactly a whole week before the official release date =0 That's new, usually her singles leak the Saturday before the release date.
My opinion on each one of the songs:
Junketsu Paradox: Awesome, perfect, flawless, etc... The beautiful PV makes it even better.
7COLORS: Sounds like a carbon copy of PERFECT SMILE to me. Nothing too special, but I still like it (note: I'm a hardcore stan and I like 99,9% of the stuff she puts out xD)
Stay Gold: Pretty epic. I get some Tenkuu no Canaria vibes from the verses.
Overall, a really good single! Which reminds that I haven't ordered it yet...