Descriptions via CDJapan:
Love Rainbow [w/ DVD, Limited Edition] | US$ 16.34
Arashi featuring the theme to TV series “Natsu no Koi wa Nijiiro ni Kagayaku” starring Jun Matsumoto. Limited edition includes a bonus DVD with video clip of “Love Rainbow” and making-of. *Unless otherwise indicated, DVDs are region-2 encoded (Japan, Europe, and Middle East), and carry no subtitles.
1. [CD] Love Rainbow
2. [CD] over
3. [DVD] Love Rainbow (Video Clip) + Making
Love Rainbow [Regular Edition] | US$ 11.11
Thirty-second single release from Arashi featuring the theme to TV series “Natsu no Koi wa Nijiiro ni Kagayaku” starring Jun Matsumoto. Regular edition includes original karaoke tracks.
1. Love Rainbow
2. over
3. Love Rainbow (Original Karaoke)
4. over (Original Karaoke)
The covers are is so out of my expectation, had thought something along the lines of a rainbow theme. However, they are still very awesome and have a mature feel to them. I cannot wait to see the PV, the boys will add another #1 to their list. 
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