HEY BOY ~Wei Shen Me?~

 is the fourth single by Weather Girls. It was released on November 20, 2013, and peaked at #54 on the Oricon singles chart.

Regular Edition CD

 * 1) HEY BOY ~Wei Shen Me?~ (HEY BOY~ウェイシェンモ?~; Wèi Shénme (为什么; Why? ))
 * 2) OMG!
 * 3) Loving Pass ~Koi no Password~ (Loving Pass~恋のパスワード~) (Chinese Version)

Limited Edition A CD

 * 1) HEY BOY ~Wei Shen Me?~
 * 2) OMG!
 * 3) HEY BOY ~Wei Shen Me?~ (Instrumental)
 * 4) OMG! (Instrumental)

Limited Edition B CD

 * 1) HEY BOY ~Wei Shen Me?~
 * 2) Loving Pass ~Koi no Password~ (Chinese Version)
 * 3) HEY BOY ~Wei Shen Me?~ (Instrumental)
 * 4) Loving Pass ~Koi no Password~ (Chinese Version) (Instrumental)

Limited Edition A DVD

 * 1) HEY BOY ~Wei Shen Me?~ (Music Video)
 * 2) HEY BOY ~Wei Shen Me?~ (Behind The Scene)

Limited Edition B DVD

 * 1) Weather Girls Hajimete no Okinawa