いれいす made "恋の約束 (Irregular record ver.)" available on November 23, 2022. With this song being around four minutes long, at 3:49, 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 いれいす's "Irregular record (A盤)" album is number 17 out of 18. On top of that, Japan appears to be the country where this track was created. 恋の約束 (Irregular record ver.) is unknown right now. Since there is more of a neutral sound being played, this makes the track somewhat danceable.
We consider the tempo marking of 恋の約束 (Irregular record ver.) by いれいす to be Andante (at a walking pace) because the track has a tempo of 83 テンポ, a half-time of 42テンポ, and a double-time of 166 テンポ. Based on that, the speed of the song's tempo is slow. The time signature for this track is 4/4.
E♭ Major is the music key of this track. This also means that this song has a camelot key of 5B. So, the perfect camelot match for 5B would be either 5B or 6A. While, 6B can give you a low energy boost. For moderate energy boost, you would use 2B and a high energy boost can either be 7B or 12B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 5A or 4B will give you a low energy drop, 8B would be a moderate one, and 3B or 10B would be a high energy drop. Lastly, 2A allows you to change the mood.