I discovered this song just a couple days ago and I've become addicted, love at first sight. The PV is great for people who know the girls too, there were moments when they really showed off their acting skills making da emo faces at the camera.
Takamina in particular is so good at looking so vulnerable, with Minegishi easily hiding her spunky streak and Haruna really selling her contemplative looks.
The lip-syncing got a little iffy though at moments.
But that song has wormed its way into my consciousness so thoroughly I more listen to the song than watch the PV anyway. Blasphemy, I know.