Naze Hito wa Arasou n' Darō? / Summer Wind / Jinsei wa Step!

"Naze Hito wa Arasou n' Darō? / Summer Wind / Jinsei wa Step!" (何故 人は争うんだろう？／Summer Wind／人生はSTEP！) is the 29th single by the Japanese female idol group Cute. It was released in Japan on October 28, 2015, on the Zetima label.

Release
It is a triple-A-sided single.

It was released in six versions: three limited ones (limited editions A, B, and C) and three regular ones (regular editions A, B, and C). All the regular editions were CD-only, while all the limited editions included an additional DVD.

Reception
The physical CD single debuted at number 2 on the Oricon daily singles chart.

On the Oricon weekly singles chart, it debuted also at number 2.