There's also the theater version which has a different cover. From the preview the PV has lots of pink and a kiss. Oh and there's marching band outfits during the chorus. Meh.
and the Undergirls PV/PV for the B side Namida no Seesaw Game is out.
http://v.youku.com/v_show/id_XMTkxNzIwNDk2.html
I love it already. 1000 times better than Heavy Rotation. Retro!