=O The chorus is different!! In the commercial it was:
"Soshite bokura wa, aruki hajimeTAAA!~(higher-pitched)"
And now it is:
"Soshite bokura wa.. aruki hajimeta.."
EDIT: OMG it's after the bridge!! Yes

I love this song so much already, can't wait for the HQ!!
Honestly, a PV for blossom and a switch-around to blossom as the main A-side, and this would've been THE #1 summer single in Japan!