Coba jelasin Promotion and release dari Mr. Simple dong

The group held a press conference at the Imperial Palace Hotel in Seoul on August 4, which attracted over 200 reporters, including 70 foreign journalists from Japan, China, Taiwan, Thailand, Hong Kong and Singapore The group expressed that they will promote the album for as long as possible till Heechul's enlistment date and also to continue with Super Show 4 World Tour.

Super Junior had their debut performance of "Mr. Simple" and a non-album track "Superman" at Music Bank on August 5, 2011, followed by Music Core the following day, Inkigayo after that and on August 11 on M! Countdown. However, promotions for the song ended on August 28 due to the enlistment of member Heechul to the army on September 1, 2011.

The album was release in 11 countries across Asia., including Taiwan on September 6, 2011 by Avex Taiwan. The album was supposed to be pre-released in the Philippines by Universal Records on October 1, 2011 but was moved to October 8, citing manufacturing problems caused by typhoon Nesat. The Type A album was officially released in the country on November 24.

After the released of "Mr Simple" in Japanese, the group followed-up with the release of "Opera" in Japanese. The single album also include the travel-themed mid-tempo ballad "Way", Japanese original music video and making-of DVD. It has been available for pre-order from 11 March 2012.