M3TRa made "HELLO!" available on November 18, 2022. For a fairly short song, this song is "HELLO!" is considered an explicit song with a duration of 1:35. Because this song is the only song in HELLO! and no other songs are present in the album, we classify this track as a single. On top of that, United Kingdom appears to be the country where this track was created. The popularity of HELLO! is currently unknown right now. The overall tone is very danceable, especially with its high energy, which produces more of a euphoric, cheerful, or happy vibe.

HELLO! テンポ

We consider the tempo marking of HELLO! by M3TRa 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 D♭ Major. This also means that this song has a camelot key of 3B. So, the perfect camelot match for 3B would be either 3B or 4A. While, 4B can give you a low energy boost. For moderate energy boost, you would use 12B and a high energy boost can either be 5B or 10B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 3A or 2B will give you a low energy drop, 6B would be a moderate one, and 1B or 8B would be a high energy drop. Lastly, 12A allows you to change the mood.