for a good cause that is! After partnering with SNSD last year, Super Junior links up with f(x) this year to promote blood donation. Blood banks around the world always require a ready supply of blood for emergencies and there is always a lull in the year where supplies run low due to several reasons. So for this year, the concept of the campaign is titled around the slogan "You're a Real Hero" for donating blood and saving lives. Check out the BTS video and promotional posters. http://www.youtube.com/watch?v=6ZQ2b0-S3QA [gallery]