緑仙 (Ryushen) is one of the most prolific and talented singers in all of Nijisanji — over 150 covers on their channel, a voice that moves comfortably from tenor to soprano, and a song selection instinct that’s rarely wrong. Their cover of キケンナアソビ (Kiken na Asobi / Dangerous Game) by クリープハイプ (Creep Hyp) is a perfect example of all three working together.
キケンナアソビ: The Original and Why It’s Such a Loaded Pick
キケンナアソビ (Kiken na Asobi) is a 2020 track by クリープハイプ (Creep Hyp) — the four-piece J-rock band known for vocalist 尾崎世界観 (Ozaki Sekaikan)‘s literary, often transgressive songwriting. Originally a B-side to their single *愛す (Aisu)* and used as an ending theme for Fuji TV’s *ウケメン (Ukemen)*, the song is about a purely physical relationship — detached, honest to the point of being brutal, with lyrics that walk the line between desire and indifference. The official MV was age-restricted on YouTube for its content. It’s not a safe song. It’s not meant to be.
Covering it requires not just vocal ability but a certain kind of confidence — the willingness to inhabit that emotional territory and make it feel genuine rather than performative. Ryushen has not officially stated their gender and intentionally withholds it to perform both masculine and feminine roles. That quality is exactly what this song needs. The ambiguity in Ryushen’s voice — the way it carries neither a distinctly masculine nor feminine identity but something in between — gives the lyrics a different texture than most covers manage. It’s unsettling in the right way. Raw without being showy.
Ryushen’s Vocal Performance on キケンナアソビ
Creep Hyp’s original has a conversational, slightly deadpan quality — Ozaki doesn’t emote heavily, he just states things with unnerving directness. Ryushen matches that energy well. Their delivery stays controlled throughout, which is the correct choice — this is a song that loses power if you oversell it. The quiet moments land the hardest. Mix by ソノイ (Sonoi) — a name that keeps appearing across strong VTuber productions this year — keeps the vocal clean and present without over-processing anything. Illustration by おおむね鶴川 (Oomune Tsurukawa), MV by 生命ぜろ (Seimei Zero) give the video a muted, atmospheric visual tone that suits the song’s mood perfectly.
Why This Cover Works for Ryushen
緑仙 (Ryushen) has been part of にじさんじ (Nijisanji) since their YouTube debut on June 8, 2018 — making them one of the longest-active members of the group. They’re also part of Rain Drops, a Nijisanji musical unit signed to Virgin Records (Universal Music Group), with multiple original albums and live tours to their name. Music is not a side activity for Ryushen — it’s core to everything they do. A cover like キケンナアソビ (Kiken na Asobi) is the kind of deliberate, considered song choice that reflects years of knowing exactly what their voice can do.
59,000 views at upload. This one’s going to circulate for a while.
Track Credits
- Title: キケンナアソビ (Kiken na Asobi / Dangerous Game)
- Vocals: 緑仙 (Ryushen)
- Original Song: クリープハイプ (Creep Hyp) — キケンナアソビ (2020)
- Mix: ソノイ (Sonoi)
- Illustration: おおむね鶴川 (Oomune Tsurukawa)
- MV: 生命ぜろ (Seimei Zero)
- Label / Channel: にじさんじ (Nijisanji) / ANYCOLOR
- Released: June 21, 2026
▶ Watch: 緑仙 (Ryushen) — キケンナアソビ (Kiken na Asobi) Cover on YouTube
