It is a pop song written by Hiro, Keith Harris, Elijah Kelley, and George Pajon, Jr, and the quintet's first original Japanese-language single.

In order to promote the single, the group held two concerts entitled Myname 1st Live "What's Up".

"What's Up" was written by Hiro, Keith Harris, Elijah Kelley, and George Pajon, Jr.[1] A pop song, it is Myname's first original Japanese-language single.

[13] On the issue dated December 3, 2012, "What's Up" debuted at number nine on Japan's national Oricon Singles Chart, selling 19,366 copies in its first week of release.

[14] According to Oricon, the single charted for three weeks and sold 22,741 copies in the country by the end of its run.