Mini Overtone

 (ミニオバトン) is the first independent mini album released by OverTone. It.

The music video for "Wave" was premiered on September 6, 2017.

The music video for "Shiori" was premiered on June 12, 2018.

Tracklist

 * 1) Shiawase no Uta (しあわせのうた)
 * 2) Tomorrow
 * 3) Encore
 * 4) Shiori (栞)
 * 5) Wave