Lil Chill", a rapper whose whereabouts are unknown and who leads the music crew "Break My Head" and is active mainly on SoundCloud. sarasa", who is also active in "Pixel Normalize Apart", a music team focusing on Rap Music, and "MeltyTune", a unit with sesaml, a member of the same team. This is the first collaboration since "godsend ft.sarasa" on Lil Chill's 1st Album "i'm no one", and the first double name release, "trash one's file.wav" is timeless, catchy, and a lyric that describes feelings like I never felt as a child. The lyrics, which express a timeless catchiness and a feeling that one could not have felt as a child, pierced the hearts of listeners and became a topic of conversation on SoundCloud.