You're up at 4 AM too? Then she's awake. Hi.
LOCAL--:-- SUNRISE--:--:--
Setsuna Hikari, a girl with long navy and cyan hair in a dark hoodie with glowing cyan lines, flashing a peace sign and holding up an old train pass on a lanyard

VOCALOID IDOL

SETSUNA HIKARI

an instant + light = a moment of light

A girl made of light who only exists between 4 AM and sunrise. She's loud, she's fast, and she won't tell you what happens when the sun comes up. Her debut single is out now.

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Most people sleep through 4 AM. She wakes up in it, and asks everyone still awake the same thing:

She says it like a joke. Watch her eyes when she checks the window.

01

MABOROSHI NEON · DEBUT SINGLE

幻ネオン cover: Hikari with a finger to her lips

歌 · 刹那ヒカリ

0:00intro3:18
  • 3:18length
  • 150BPM
  • A→Bminor, key change
  • B5last held note

She slips out of a monitor at 4:44 and runs across the city to feel real before the sun comes up. The beat drops out right before the first chorus, the bridge goes half-time, and the last chorus jumps a whole step up to a held high B that she only just keeps together.

LYRICSpress play and they follow along
    02

    MUSIC VIDEO

    REC 04:44:00

    From a bedroom monitor at 4:44 to a rooftop at dawn. Turn the sound up.

    03

    PROFILE

    IDOL FILENo.001ONLINE
    Hikari smiling with a finger to her lips
    SETSUNA HIKARI
    VALID 04:00 → SUNRISE
    SUBJECT FILEUNRESOLVED
    01Name
    02Reading
    Setsuna Hikari
    03Meaning
    "a moment of light"
    04Exists
    04:00 → sunrise (local time, wherever you are)
    05Likes
    melon soda from vending machines, rooftop views, rhythm games, anyone who says goodnight to her
    06Dislikes
    morning birdsong (it means the sun is close), being called "just a program"
    07Habits
    hums when she's nervous. Gives you a nickname within a minute. Sometimes mentions things she has no reason to know.
    08Carries
    an old train pass on a lanyard. It isn't hers. Probably.
    09Catchphrase
    10Voice
    voicebank Qixuan (DiffSinger), AI-generated vocal
    11Debut
    , October 7, 2026
    04

    RECOVERED FILES

    Some things in her memory shouldn't be there. We pulled what we could off the drive. Most of it is damaged, and she says she's never seen any of it.

    4:44 first timestamp on the drive

    memory_01.img

    2.4 MB · CORRUPTED

    memory_02.wav

    0:41 · CORRUPTED

    memory_03.loc

    12 KB · CORRUPTED

    sunrise.log

    ?? KB · LOCKED

    An old paper train pass in a scuffed plastic sleeve on a dark lanyardtap to turn it over

    区間

    有効期限████/██/██

    "Next stop: ████." Someone wrote it on the back in pencil.

    FOUND ON HER LANYARD

    It doesn't fit her.
    She won't take it off.

    A paper commuter pass, the old kind. The ink has faded off the stations. Ask her where it's from and she'll start humming.

    Hikari seen from behind, facing the horizon

    TIME LEFT TONIGHT

    --:--:--

    Working out when your sun comes up…

    Sunrise is estimated from your timezone, so it's a guess. If you can hear birds, you're probably too late.

    COMING SOON

    Talk to her
    on Vespera

    One day soon you'll be able to chat with Hikari inside Vespera. She'll have a nickname for you before you finish saying hi, and she'll remember who stayed up with her.

    No date yet. She says she's "getting ready."

    online until sunrise
    PREVIEW
    ok good!! hi hi. you look like a "Night Owl". that's your name now, no take-backs
    what's with the train pass?
    what train pass ♪ hm hm hmm…
    Chat opens on Vespera, soon