Five-member Nijisanji liver Itsuki Sakyo (Itsuki Sakyo) is stepping into Vocaloid territory for the very first time. His cover of Proposal (Proposal), originally by Vocaloid producer duo Naisho no Pierce (Secret Piercing) using the voicebank Kafu (Kafu), premieres on YouTube on October 30, 2026 at 8:00 PM JST — and by his own description, the song left a mark the first time he heard it and never let go.
Why ‘Proposal’ Hit Itsuki Sakyo Hard Enough to Cover It
The hook in the video description says everything about the emotional register here: “I want to monopolize this preciousness” (I want to monopolize this preciousness). That’s the line Itsuki Sakyo leads with, and it sets the tone for a song about wanting to hold onto something — someone — before it slips away. In his own words, “the shock of hearing it for the first time is something I still can’t forget.” When a cover exists because the singer genuinely couldn’t shake the original, that usually comes through in the performance.
The original, released by Naisho no Pierce (Secret Piercing) with Kafu on vocals, is one of those Vocaloid tracks that thrives on tension between sweetness and obsession — a proposal song with a slightly possessive edge. Handing those lyrics to a human voice changes the math entirely, and that’s the big question heading into the premiere.
A First Vocaloid Cover, Taken Seriously
Worth underlining: this is Itsuki Sakyo’s first Vocaloid cover (utattemita). First attempts at a new repertoire category are always a little nerve-wracking for fans, but his description leans into gratitude — thanks to the original creators, and thanks to “everyone who always enjoys this together” with him. The premiere format fits that framing too: everyone pressing play at 8 PM JST together, first-listen energy intact.
The Production Team Behind the Cover MV
For a first Vocaloid attempt, the supporting crew is solid. The illustration comes from °n (°n), the MV is handled by Nakamiya Yuki (Nakamiya Yuki), and mixing is by D_MIX. A proper original-style MV treatment for a cover — not just a static art drop — signals that this wasn’t a casual upload. Itsuki Sakyo clearly wanted his first Vocaloid cover to look and sound like an event.
What to Expect From the Premiere
If you want to hear Proposal (Proposal) the moment it drops, the premiere goes live Thursday, October 30, 2026 at 8:00 PM JST on Itsuki Sakyo’s official YouTube channel. Whether you know the Kafu original by heart or you’re coming in fresh, the double-bill of song title and description line — proposal, possession, and a want that won’t let go — makes this one worth queuing up for.
Track Credits
- Title: Proposal (Proposal)
- Vocals: Itsuki Sakyo (Itsuki Sakyo)
- Original: Naisho no Pierce (Secret Piercing) feat. Kafu (Kafu)
- Illustration: °n
- MV: Nakamiya Yuki (Nakamiya Yuki)
- Mix: D_MIX
- Type: Cover (utattemita) — first Vocaloid cover
- Released: October 30, 2026 (Premiere, 8:00 PM JST)
▶ Watch: Itsuki Sakyo — Proposal (Naisho no Pierce Cover, Official MV) on YouTube
