Inui Toko and Amamiya Kokoro Turn "flos" Into a Duet

Inui Toko (戌亥とこ) and Amamiya Kokoro (天宮こころ) have released a duet cover of flos, and it’s a song that’s clearly having a moment right now — this marks the second high-profile VTuber cover of the track in recent weeks, a real sign of how much this particular Vocaloid deep cut has resonated lately.

A Song Built From Flowers That Won’t Last

flos was written and produced by R Sound Design, originally released in March 2018 featuring Hatsune Miku. The lyrics thread together a long string of Latin flower names as a backdrop for a much heavier story underneath — a dream that scattered before it could bloom, and a devotion the narrator realizes too late meant nothing to hold onto. Both this cover’s caption and the earlier one from just weeks ago quote the same devastating line: “there’s no meaning in having clung to it.”

Turning a Solo Song Into a Shared One

What makes this version distinct is the duet format — where the original leans on a single voice carrying that quiet grief alone, splitting it between Toko and Kokoro turns the song into something closer to two people sitting with the same sadness together rather than one voice isolated in it. That shift in perspective is a meaningful one for a song this internally focused.

The Team Behind the Cover

Illustration comes from Kawa (Kawa様), movie work from Marumaru (◯◯-まるまる-), mixing from Sui (すい), and the instrumental from Akitaro Aki (安芸章太郎).