[Machine Translation] The summer single from the singer-songwriter unit "RYTHEM" is a lyrical, sad and fragile medium love ballad with a sense of the season, similar to "Sakura Uta", written by YUI. The lyrics were written by YUI, and the song vividly evokes the sad and passionate feelings that remain in the back of your mind even after a breakup. The sad lyrics, which compare such feelings to the fleeting yet beautiful "firefly light" that can only shine for a week, are sure to reach the hearts of everyone, regardless of generation. The arrangement was done by J-POP master Satoshi Takebe, as in "Sakura Uta". The arrangement, which highlights the piano and acoustic guitar, and the emotional vocals of the two musicians as they breathed during the recording, gives the song a wider worldview. The coupling song was written by YUKA. The lyrics, which describe realistic feelings of budding love for a male friend, are a type of love song that has never appeared on RYTHEM's previous albums.