Hey!

 is a mini album of WHY@DOLL, it was released by T-Palette Records. It was released on February 12, 2019, and peaked at #53 on the Oricon album chart.

Tracklist

 * 1) Que Sera Sera (ケ・セラ・セラ)
 * 2) Futari de Ikite Yukereba (ふたりで生きてゆければ)
 * 3) It's all right!!
 * 4) Mr.boyfriend
 * 5) Que Sera Sera (ケ・セラ・セラ) (Naked)
 * 6) Futari de Ikite Yukereba (ふたりで生きてゆければ) (Naked)
 * 7) Que Sera Sera (ケ・セラ・セラ) (Instrumental)
 * 8) Futari de Ikite Yukereba (ふたりで生きてゆければ) (Instrumental)
 * 9) It's all right!! (Instrumental)
 * 10) Mr.boyfriend (Instrumental)