"Letters" is a song by the Japanese four-member boy group Wolf Howl Harmony, released digitally as a single on February 7, 2025, through Rhythm Zone. The lyrics were written by RYOJI, SUZUKI, GHEE, HIROTO, and FUKI, while the composition was handled by Erik Lidbom, Adam Jonsson, and Masaki Tomiyama. It is the groupâÂÂs first ballad following their major-label debut and was later included on their first studio album WOLF, released on March 12, 2025.
As the first ballad released after their major-label debut, the song marks the first time the members themselves participated in writing the lyrics. On February 6, 2025, handwritten letters the members wrote to one another were published on the groupâÂÂs official Instagram account, and the song was released as a surprise at midnight on February 7, approximately three hours later. During the album production process, the group expressed a desire to âÂÂinclude a song that reflects the membersâ own feelings,â which became the starting point for creating this track.
âÂÂLettersâ is a slow-tempo ballad whose lyrics were developed based on the letters the members exchanged with one another. The lyrical themes center on the membersâ bonds, mutual trust, and their determination for the future. For the songwriting, each member wrote a letter without establishing a predetermined direction, and the lyricist Fuki compiled their contents into the final lyrics. Ghee commented that âÂÂbecause the lyrics are based on real experiences, the emotions naturally come through, and it became a song we can perform with genuine conviction.â The pop culture outlet EnVi Media described the song as highlighting âÂÂthe groupâÂÂs shared journey and the new chapter they are embarking on together.âÂÂ
In reference to the âÂÂlettersâ that inspired the songâÂÂs creation, the cover artwork features a hand-drawn illustration by Ghee, designed to resemble a letter.
The handwritten letters that served as the basis for the lyrics were revealed on the groupâÂÂs official Instagram shortly before the surprise digital release.