Lunaromar's 'My letter to ü' came out on February 14, 2024. My letter to ü is 2 minutes and 59 seconds long and may contain bad words that may be unsuitable for children. Because this song is the only song in My letter to ü and no other songs are present in the album, we classify this track as a single. In terms of popularity, My letter to ü is currently not that popular. Although the tone can be danceable to some, this track does projects more of a negative sound rather than a postive one.

My letter to ü テンポ

We consider the tempo marking of My letter to ü by Lunaromar to be Andante (at a walking pace) because the track has a tempo of 95 テンポ, a half-time of 48テンポ, and a double-time of 190 テンポ. Based on that, the speed of the song's tempo is slow. Activities such as, yoga or pilates, can go well with this song. The time signature for this track is 4/4.

My letter to ü キー

This song is in the music key of F♯ Major. This also means that this song has a camelot key of 2B. So, the perfect camelot match for 2B would be either 2B or 3A. While, 3B can give you a low energy boost. For moderate energy boost, you would use 11B and a high energy boost can either be 4B or 9B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 2A or 1B will give you a low energy drop, 5B would be a moderate one, and 12B or 7B would be a high energy drop. Lastly, 11A allows you to change the mood.