Like I said before, I'm a sucker for this group since day 1.
Now we're talking about the most epic comeback in the history of Korea K-Pop ever.
Throwing back to 2015, when the JYP's living legend K-Pop group Wonder Girls did their comeback for the upcoming 3rd album: Reboot.
They launched these instrumental teasers as an introduction and also recognition as the first K-Pop group (and probably the last) that switched a concept from "dance and sing" into a literally music band by singing and playing a music instruments.

Did your idols do this? I don't think so.

Check the original videos:
원더걸스(Wonder Girls) Instrument Teaser Video 1. Sunmi
https://youtu.be/cZuv_woHhb8
원더걸스(Wonder Girls) Instrument Teaser Video 2. Yubin
https://youtu.be/LlGjbdZdiqE
원더걸스(Wonder Girls) Instrument Teaser Video 3. Hye Rim
https://youtu.be/t0aSDCau6kY
원더걸스(Wonder Girls) Instrument Teaser Video 4. Ye Eun
https://youtu.be/DeE63IkPzVc

Wonder Girls Official Facebook: http://www.facebook.com/wondergirlsworld
Wonder Girls Official Twitter: http://www.twitter.com/WonderGirls
Wonder Girls Official Homepage: http://wondergirls.jype.com

Copyrights 2015 ⓒ JYP Entertainment. All Rights Reserved.

COPYRIGHT DISCLAIMER:
Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favour of fair use.
ALL RIGHTS BELONG TO THEIR RESPECTIVE OWNERS.