KIRA made "Hello!" available on February 4, 2015. With this song being around four minutes long, at 3:53, the duration of this song is pretty average compared to other songs. This track is safe for children and doesn't appear to contain any foul language, since the "Explicit" tag was not present in this track. The track order of this song in KIRA's "Listener Killer" album is number 2 out of 15. The popularity of Hello! is currently not that popular right now. Since there is more of a neutral sound being played, this makes the track somewhat danceable.

Hello! テンポ

We consider the tempo marking of Hello! by KIRA to be Vivace (lively and fast) because the track has a tempo of 170 テンポ, a half-time of 85テンポ, and a double-time of 340 テンポ. Based on that, the speed of the song's tempo is fast. The time signature for this track is 4/4.

Hello! キー

This song is in the music key of B Major. This also means that this song has a camelot key of 1B. So, the perfect camelot match for 1B would be either 1B or 2A. While, 2B can give you a low energy boost. For moderate energy boost, you would use 10B and a high energy boost can either be 3B or 8B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 1A or 12B will give you a low energy drop, 4B would be a moderate one, and 11B or 6B would be a high energy drop. Lastly, 10A allows you to change the mood.