Barely two months since their debut and the girls of Y4T4 (ヤタ) — にじさんじ (Nijisanji)‘s newest streamer team — are already putting out group covers that feel genuinely confident. 小々波いるか (Kokonami Iruka), Rei7 (Reina), 千凛あゆむ (Senri Ayumu), and 御子神琴音 (Mikogami Kotone) tackle キスハグ侵略者！(Kiss Hug Invader!) by iLiFE! — and honestly? It’s a great pick.
キスハグ侵略者！: The Original and Why It Works for Y4T4
キスハグ侵略者！(Kiss Hug Invader!) is a 2024 idol pop track by iLiFE!, written and composed by Medansy — a high-energy, slightly chaotic song built around the premise of someone aggressively, enthusiastically chasing after someone they like. The call-and-response structure, the crowd chants baked into the arrangement, the sheer relentless forward momentum of it — it’s a song designed for groups, for noise, for fun. For a brand new unit of four girls still figuring out their dynamic, it’s exactly the kind of cover that lets personalities shine through without requiring a perfectly polished sound. The song carries itself. They just had to ride it.
And they do. The four voices are distinct enough to keep the track interesting through each section — 小々波いるか (Kokonami Iruka) and 千凛あゆむ (Senri Ayumu) bring brightness and bounce, 御子神琴音 (Mikogami Kotone) has a slightly warmer tone that grounds it, and Rei7 (Reina) — self-described as Y4T4’s “chill member” but anything but — pulls her weight in the more energetic sections with obvious enthusiasm. Mix by しんたろ (Shintaro) of In Fleur Inc. keeps everything clean and lively.
The Call Section — and Why It Matters
One of the fun things about this cover is the call section, handled by the Y4T4 boys — Y4T4男 (Y4T4 Otoko), 男虎 (Onotora), 九里詠太 (Kuri Eita), 塚原大地 (Tsukahara Daichi), and レヨン (Rayon). キスハグ侵略者！(Kiss Hug Invader!) has crowd calls built in by design — the “uryaoi!” chants and back-and-forth are half the song’s energy — and getting the whole group involved turns what could have been a standard four-person vocal cover into something that feels like a genuine Y4T4 moment. It’s the kind of detail that makes a cover feel like it belongs to the unit rather than just being a song they happened to record.
Two Months In and Already Here
Y4T4 debuted on April 22, 2026, making this cover barely eight weeks into their existence as a group. The eight-member team was announced as a Nijisanji-first experiment, streaming primarily on Twitch alongside their YouTube presence — a different model from most Nijisanji members, and one that’s already given them a distinct identity in the wider VTuber space. Covers like this one help build the musical side of that identity. Illustrated by 田中胡椒 (Tanaka Kosho) with mini character art by Rei7 herself, and MV by 楪のどか (Yuzuriha Nodoka) — it looks the part too.
If you haven’t been following Y4T4 yet, this cover is a solid entry point into what they’re building. Loud, fun, and very much themselves.
Track Credits
- Title: キスハグ侵略者！(Kiss Hug Invader!)
- Vocals: 小々波いるか (Kokonami Iruka), Rei7 (Reina), 千凛あゆむ (Senri Ayumu), 御子神琴音 (Mikogami Kotone)
- Call: Y4T4男 (Y4T4 Otoko), 男虎 (Onotora), 九里詠太 (Kuri Eita), 塚原大地 (Tsukahara Daichi), レヨン (Rayon)
- Original Song: iLiFE! — キスハグ侵略者！(Kiss Hug Invader!) (2024, written & composed by Medansy)
- Instrumental: かずた (Kazuta)
- Mix: しんたろ (Shintaro) / In Fleur Inc.
- Illustration: 田中胡椒 (Tanaka Kosho) (full body), Rei7 (mini character art)
- MV: 楪のどか (Yuzuriha Nodoka)
- Label / Channel: にじさんじ (Nijisanji) / ANYCOLOR
- Released: June 19, 2026
▶ Watch: 小々波いるか, Rei7, 千凛あゆむ, 御子神琴音 — キスハグ侵略者！(Kiss Hug Invader!) Cover on YouTube
