This is IOSYS being completely unhinged and it's exactly what you'd expect from mid-2000s Touhou comedy. Touhou Desu kedo Nani ka? plays out like a chaotic variety show set to music, with tracks like 東方Vsイオシス bouncing between call-and-response bits and absurd vocal deliveries that feel straight out of a late-night variety segment.
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東方やらねぇ？ hits with this punchy energy that's half challenge, half inside joke. The fake preview tracks for 東方老々伝 and 東方法廷帖 feel like parody trailers that somehow go harder than they need to. 東方の歌 closing things out almost feels sincere, which makes it funnier.
Just pure Comiket-era chaos energy. If you ever wondered what peak 2006 doujin nonsense sounded like, this is the answer.