Hazzie's 'Only One。' came out on January 1, 2013. Only One。 is about six minutes long, preciously at 5:32, making this song fairly long compared to other songs. There is only one song in 超ハジバム。, so we believe that "Only One。" is a single. The popularity of Only One。 is currently not that popular right now. Although the tone can be danceable to some, this track does projects more of a negative sound rather than a postive one.

Only One。 テンポ

The tempo marking of Only One。 by Hazzie is Presto (very, very fast), since this song has a tempo of 178 テンポ. With that information, we can conclude that the song has a fast tempo. The time signature for this track is 4/4.

Only One。 キー

This song is in the music key of A♭ Major. This also means that this song has a camelot key of 4B. So, the perfect camelot match for 4B would be either 4B or 5A. While, 5B can give you a low energy boost. For moderate energy boost, you would use 1B and a high energy boost can either be 6B or 11B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 4A or 3B will give you a low energy drop, 7B would be a moderate one, and 2B or 9B would be a high energy drop. Lastly, 1A allows you to change the mood.