Sakuna Yuuki (結城さくな) has released a new original song called Nyan Nyan Kyururun Neko Noudo (にゃんにゃんきゅるるん猫濃度) — roughly “Nyan Nyan Kyururun Cat Density” — and it is exactly as delightfully unhinged as that title promises. The hook: a maid who skips her chores and slowly turns 100% cat. That’s the whole premise, and the song commits to it completely, right down to lyrics about wanting to curl up in cardboard boxes and lick paste off envelopes. It’s silly. It knows it’s silly. That’s the point.
A Cat-Maid Idol Anthem Written by Tomoko Sasaki
The song itself comes from Tomoko Sasaki (ササキトモコ), who handles both lyrics and music, with arrangement by Naofumi Hataya (幡谷尚史). If those names ring a bell, it’s because they’re veterans of the Japanese game and anime music world — and that pedigree shows. The track is bouncy, sugary J-pop built for maximum cuteness overload, with a chorus that leans hard into the “nyan nyan kyururun” chant. It’s the kind of earworm that will be stuck in your head by the second listen, whether you want it there or not. You will want it there.
The Cat Transformation Lyrics Are Weirdly Relatable
What sells the song beyond the melody is how specific the writing is. Sakuna’s maid character isn’t just becoming a cat — she’s negotiating with it. The cat ears? Fine, actually kind of cute. The whiskers and paw pads? Getting in the way of her job. She wants to work, honestly she does, but the cat density keeps climbing. The lyrics bounce between dutiful maid politeness (“welcome home, master”) and full feline regression (“if I end up covered in fur, I’ll just elope with the house cat”), and that push-pull gives the song a genuine comic engine rather than just cute noise.
A Genuine Anime Production From Sanzigen
The MV isn’t a slideshow — it’s a full anime production from SanZigen (サンジゲン), the studio behind some seriously high-profile animation work, with Tomomi Umetsu (梅津朋美) directing, storyboarding, and editing. Full 3DCG character animation, motion capture, a real color script, an animation staff roster longer than some TV episodes. One fun detail: the video uses Sakuna’s previous visual model due to production timing, as she notes herself — a small, honest touch that fans will appreciate. The scale of this production for an independent VTuber’s original song is genuinely impressive.
Why ‘Nyan Nyan Kyururun Neko Noudo’ Matters for Sakuna Yuuki
Sakuna has built her channel on singing — her covers playlist is right there in the description — but this original is a statement piece. The song openly declares her ambition in-universe: becoming “the idol of the cat-maid world.” An original song with an anime-grade MV, written by Sasaki and arranged by Hataya, is a pretty serious way to chase that goal. With over 134,000 views and a like ratio north of 7.6% in the first days, the cat density is clearly spreading. Resistance is futile — just get your nyan nyan kyururun on.
Track Credits
- Title: Nyan Nyan Kyururun Neko Noudo (にゃんにゃんきゅるるん猫濃度)
- Vocals: Sakuna Yuuki (結城さくな)
- Lyrics & Music: Tomoko Sasaki (ササキトモコ)
- Arrangement: Naofumi Hataya (幡谷尚史)
- Mix: Tadashi Miyayoshi (宮吉忠)
- Dance Choreographer: Wata (わた)
- MV Director / Storyboard / Editing: Tomomi Umetsu (梅津朋美)
- Animation Production: SanZigen (サンジゲン)
- Released: October 27, 2026
▶ Watch: Sakuna Yuuki — Nyan Nyan Kyururun Neko Noudo (Original Anime MV) on YouTube
