Beastly idol group 2PM and vocal-based idol group 2AM originated from the group One Day. The two groups are uniting at last for the special documentary Beyond the ONEDAY ~ The Story of 2PM & 2AM, and they're performing the film's theme song together as one unit! In addition to the movie theme song, this special also includes B-side track No Goodbyes, composed by 2PM's Junsu.
This edition comes with a bonus DVD containing two versions of the On
2PM+2AM ’Oneday’ - One day 
Size: 29.28Mb (320Kbps)
1. One day
2. No Goodbyes
3. One day (without main vocal)
4. No Goodbyes (without main vocal)