Kobo Kanaeru and Vestia Zeta Release Teka-Teki Hati in Indonesian and Japanese

Kobo Kanaeru and Vestia Zeta of hololive Indonesia have released a new collaborative single, Teka-Teki Hati, on September 29, 2026. hololive RECORDS launched the song simultaneously in two languages: the Indonesian release retains the Teka-Teki Hati title, while the Japanese version is titled 心のなぞなぞ.

The track places Kobo and Zeta together in a lighthearted romantic duet built around the idea of a “riddle of the heart.” Kobo is also directly involved behind the song, receiving both lyric-writing and composition credits alongside several collaborators.

Quick Summary

• Indonesian title: Teka-Teki Hati
• Japanese title: 心のなぞなぞ
• Artists: Kobo Kanaeru, Vestia Zeta
• Type: single / VTuber duet
• Label: hololive RECORDS
• Release date: September 29, 2026
• Language version: Indonesian
• Language version: Japanese
• Status: released
• Primary format: digital music release
• Indonesian version: has its own official streaming landing page
• Japanese version: has its own official streaming landing page
• Indonesian catalog number: CVRD-829
• Japanese catalog number: CVRD-830
• Teka-Teki Hati runtime: 3:28
• 心のなぞなぞ runtime: 3:28
• Additional track: Teka-Teki Hati - 心のなぞなぞ (Instrumental)
• Instrumental runtime: 3:28
• Total runtime per release: 6:56
• Tracks per release: 2
• OTOTOY Indonesian format: 24bit/48kHz Hi-Res
• OTOTOY Japanese format: 16bit/44.1kHz Lossless
• Lyricist: Kobo Kanaeru
• Lyricist: Rajasa
• Lyricist: Nicholas Dwi
• Composer: Kobo Kanaeru
• Composer: Farhan Sarasin
• Composer: Rajasa
• Arranger: Farhan Sarasin
• Core theme: romantic feelings that are difficult to express
• Lyric style: playful and conversational
• Notable element: direct exchanges between the two voices
• Kobo Kanaeru: member of hololive holoh3ro
• Vestia Zeta: member of hololive holoh3ro
• Generation: hololive Indonesia 3rd Generation
• Cover: starry night and moon-themed illustration
• Spotify: Teka-Teki Hati has an active streaming page
• Dedicated visual MV/PV: not found in the verified official sources
• Physical edition: unannounced
• Single global price: not established in the verified sources

Teka-Teki Hati and the Cover Artwork

Two Versions Arrived Simultaneously on September 29

hololive RECORDS released Teka-Teki Hati and 心のなぞなぞ together on September 29, 2026.

They are not simply presented as one listing with a language toggle. The official streaming campaign provides separate landing pages for the Indonesian and Japanese versions, while OTOTOY also treats them as distinct digital releases with different catalog numbers.

The Indonesian edition uses CVRD-829, while the Japanese edition is CVRD-830.

Their package structures are otherwise identical. Each includes a 3-minute-28-second vocal track and the Teka-Teki Hati - 心のなぞなぞ (Instrumental) track at the same length, bringing each digital release to a total runtime of 6 minutes and 56 seconds.

That approach lets listeners choose their preferred vocal language while retaining the same official instrumental counterpart.

A Duet About Feelings That Refuse to Come Out Easily

The song centers on feelings that may seem obvious internally but become surprisingly difficult to say aloud.

The Indonesian lyrics use questions, guessing games, curiosity and casual exchanges between two voices to establish Kobo and Zeta's chemistry. Rather than leaning into heavy romantic drama, the tone is playful—built around shyness, teasing and attempts to communicate what is really happening in someone's heart.

The Japanese 心のなぞなぞ preserves that core idea. The lyrics listed by Uta-Net continue to frame the heart as something that does not always translate thoughts into words as easily as expected.

Because the song is structured as a duet, the vocal interaction becomes part of its identity. Kobo and Zeta are not merely alternating isolated verses; the concept itself benefits from having two voices respond to and play off each other.

That mood is also reflected in the cover artwork, which places the pair together beneath a blue, star-filled night sky.

Kobo Kanaeru Is Credited as Both Lyricist and Composer

Kobo is directly involved in the song's creative process.

Uta-Net's credits for Teka-Teki Hati list Kobo Kanaeru, Rajasa and Nicholas Dwi for the lyrics.

Composition is credited to Kobo Kanaeru, Farhan Sarasin and Rajasa, while Farhan Sarasin handles the arrangement.

The Japanese 心のなぞなぞ page lists the same credit lineup.

Kobo's contribution therefore extends beyond her performance with Zeta, placing her among the people responsible for shaping both the words and composition behind the duet.

The verified sources do not provide a separate Japanese adaptation or translation credit, so no individual localization role is being inferred beyond those officially listed credits.

The Two Digital Releases Use Different Catalog Numbers and OTOTOY Formats

Although both versions arrived together and share an identical track structure, their digital metadata is not completely identical.

OTOTOY lists Teka-Teki Hati / CVRD-829 as a 24bit/48kHz Hi-Res release.

The Japanese 心のなぞなぞ / CVRD-830, meanwhile, is listed as 16bit/44.1kHz Lossless on the same store.

Those specifications describe the files distributed through OTOTOY and should not be assumed to represent the audio format used by Spotify or every other streaming platform.

Both releases remain under hololive RECORDS, share the same September 29 date and run for 6:56 in total.

Pricing can also differ depending on store and region. OTOTOY does not display a track price in the verified listing data, so this article does not assign a single global price to the release.

Kobo and Zeta Both Come From holoh3ro

The collaboration brings together two talents from the same generation.

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Kobo Kanaeru and Vestia Zeta are members of hololive Indonesia 3rd Generation, also known as holoh3ro, alongside Kaela Kovalskia.

Vestia Zeta debuted on March 25, 2022, while Kobo Kanaeru held her debut stream on March 27, 2022. hololive's official talent pages continue to list both under the hololive holoh3ro unit.

The pair have appeared together across wider hololive Indonesia activities and group music before, but Teka-Teki Hati gives Kobo and Zeta a more focused space as the two central voices of one collaborative single.

Releasing Indonesian and Japanese versions on the same day also allows the song to retain the linguistic identity of the talents' home branch while offering a dedicated version for Japanese listeners.

No Dedicated Visual MV Has Been Verified Yet

At the time of writing, the official material that can be verified primarily centers on the digital audio release and cover artwork.

Streaming landing pages for both language versions are active, alongside the Spotify release and digital-store listings such as OTOTOY. Uta-Net has also published songwriting credits and lyrics for both songs.

However, no dedicated music video, animated MV, official visual lyric video, PV or other non-live promotional video has been verified as the main visual material for Teka-Teki Hati.

For that reason, this article does not include a video-still grid or a Short/Reels package. A future dedicated MV from hololive RECORDS, Kobo, Zeta or another official hololive channel could warrant a separate update.

For now, the official cover artwork remains the release's primary visual.

Why This Matters

1) Indonesian and Japanese listeners receive dedicated versions

Rather than changing only metadata, hololive RECORDS provides two separate vocal releases with their own landing pages and catalog numbers.

2) Kobo is directly involved in creating the song

Kobo is credited as both a lyricist and composer, extending her role well beyond the vocal performance.

3) The duet format makes use of the pair's chemistry

The “riddle of the heart” concept is built around questions, teasing and conversational exchanges, making two voices central to the song's identity.

4) The single gives two holoh3ro members a more personal collaboration

Kobo and Zeta have shared the same generation for years, while this release places the two of them at the center of one collaborative song.

Music and VTuber Information

For now, the additional important information currently known includes:

• Teka-Teki Hati is a collaborative single by Kobo Kanaeru and Vestia Zeta
• the release is issued through hololive RECORDS
• its official release date is September 29, 2026
• the Indonesian version is titled Teka-Teki Hati
• the Japanese version is titled 心のなぞなぞ
• both versions launched on the same day
• each version has a separate official streaming landing page
• the Indonesian version uses catalog number CVRD-829
• the Japanese version uses catalog number CVRD-830
• each release contains two tracks
• the Indonesian vocal track is Teka-Teki Hati
• the Japanese vocal track is 心のなぞなぞ
• both vocal tracks run for 3:28
• the second track on both releases is Teka-Teki Hati - 心のなぞなぞ (Instrumental)
• the instrumental runs for 3:28
• each release has a total runtime of 6:56
• OTOTOY lists the Indonesian version as 24bit/48kHz Hi-Res
• OTOTOY lists the Japanese version as 16bit/44.1kHz Lossless
• those specifications describe OTOTOY's available files and do not automatically apply to every platform
• Kobo Kanaeru is credited for lyrics
• Rajasa is credited for lyrics
• Nicholas Dwi is credited for lyrics
• Kobo Kanaeru is credited for composition
• Farhan Sarasin is credited for composition
• Rajasa is credited for composition
• Farhan Sarasin handles the arrangement
• Uta-Net lists the same credit lineup for both language versions
• the Indonesian version uses a playful romantic theme
• dialogue and back-and-forth exchanges are prominent in the lyrics
• the Japanese version retains the central theme of feelings that are difficult to express
• the cover artwork uses a starry night motif
• Kobo and Zeta are depicted together on the artwork
• Kobo Kanaeru is a member of hololive holoh3ro
• Vestia Zeta is also a member of hololive holoh3ro
• both are part of hololive Indonesia 3rd Generation
• Vestia Zeta debuted in March 2022
• Kobo Kanaeru debuted in March 2022
• no dedicated physical CD release has been announced in the verified sources
• no dedicated visual MV/PV has been verified at the time of writing
• pricing can vary by platform and region
• the release is currently available digitally
• the main announcement is available through the hololive RECORDS Official X Post
• the Indonesian version is available through the Teka-Teki Hati Official Streaming Link
• the Japanese version is available through the 心のなぞなぞ Official Streaming Link
• Spotify streaming is available through Teka-Teki Hati on Spotify
• the Indonesian Hi-Res release is available through Teka-Teki Hati on OTOTOY
• the Japanese release is available through 心のなぞなぞ on OTOTOY

Closing

Teka-Teki Hati brings Kobo Kanaeru and Vestia Zeta together in a duet deliberately released for two languages. The Indonesian and Japanese editions arrived simultaneously on September 29, 2026, with Kobo also participating in the song's lyric writing and composition.

The release currently centers on digital audio and its cover artwork. No dedicated visual MV or physical edition has been verified yet, leaving any additional presentation or merchandise to future announcements from hololive RECORDS and the two talents.