Hoping to bring happiness at the start and end of the day at 7 O'clock, the 6-member boy group Seven O'Clock made their debut.<br /><br />With the rhythm of pungmul, "ECHO" is about wanting to stay near each other and lean on each other for support.<br /><br />Visit ‘Simply K-Pop’ Official Pages<br />Facebook: https://www.facebook.com/arirangsimplykpop<br />Twitter: https://twitter.com/_Simplykpop<br />Google+: https://plus.google.com/+ArirangKr_simplykpop<br /><br />Visit ‘Arirang K-Pop’ Official Pages<br />Facebook(K-POP): http://www.facebook.com/arirangkpop<br />Google+(K-POP): http://plus.google.com/+arirangworld<br /><br />Homepage: http://www.arirang.com<br />Facebook: http://www.facebook.com/arirangtv<br />Twitter: http://twitter.com/arirangworld<br />Instagram: http://instagram.com/arirangworld
