^Wrong guess.
Finally
Reboot is a pop-rock song.
I feel like we're back in 2010 with this song. I'm waiting the full track to have a proper view but it surprised me. Especially the bridge after the introduction. The arrangement is surprisingly good.
The covers are out :
http://www.generasia.com/wiki/Reboot_(miwa)
They give me a eighties vibe with the plain background. Immediately I thought about Seiko Matsuda's covers when I saw them. I know the look is different but there is a little something...