I originally heard the song on ANIMAX MUSIX in either 2016 or 2017. I thought the title was Polaris but when I searched on YouTube, it wasn't the song I was searching for. 

So The song had deep blue night sky+starry  background. It had 3 boy band members in B&W avatar. Whenever the lyrics stopped, it had two girls weirdly dancing similar to frederic's 'oddloop' song. The song had quite a relaxing and calm vibe even though it looked like a rock song. Release is most likely between 2015—2017. That's all I remember. 

Please Help. 

do you know what anime it was from?

You can search that way

 Old_Anime_Lady:

do you know what anime it was from?

You can search that way

It was a full Japanese MV I watched on TV. I The program only used to show unsubbed Japanese songs on TV. They hardly ever featured any song from anime. I only remember watching Sorewa Chisana by Sayuri (ERASED ED) and I didn't even knew it was used for anime .

ahh   hmm then I dont know cause my scope on jmusic is limited