Kaori Utatsuki has been played on NTS shows including Bo Ningen, with One small day -The Front Line Covers- first played on 24 November 2020.

Kaori Utatsuki (詩月カオリ, born September 6th in Sapporo, Hokkaido, Japan) is a vocalist and lyricist, and a former member of I've Sound and Love Planet Five. Her debut solo song "Senecio" was published in 2002. In August 2007, she released her major debut single entitled "Shining stars bless☆" which was used as the opening theme for the visual novel game anime series "ななついろ★ドロップス" (Nanatsuiro★Drops). Her first mini album, SPYGLASS, was released in 2009. She left I've Sound and her label in 2013 after releasing her farewell mini album "GOING ON".

Since 2015 she has been signed to Felis Label as a solo artist. Her latest song, released in October 2015, is titled A STARRY NIGHT ～僕らをつなぐ光～ (A Starry Night ~Bokura wo tsunagu hikari~, "A Starry Night ~The Light That Connects Us~").