POP APP

 is the second mini album of OverTone. It was released digitally on December 7, 2022.

The song "Rongai" was released beforehand as a digital single on November 9.

Tracklist

 * 1) Prologue
 * 2) Akai Sen (赤い線 Red Line)
 * 3) Rongai (論外 Impossible)
 * 4) Sore to, Ai (それと、愛 Then, Love)
 * 5) Tsuyogari (つよがり Bluff)
 * 6) Have a nice day!!!