7 seven
I don’t have reliable specific information about a Visual Kei band called “7 seven” in my training data, so I cannot confidently provide accurate details about their style, era, or contributions even though you’ve indicated they’re listed on vkdb.jp. Rather than write inaccurate details, I’d recommend checking vkdb.jp directly or other Japanese VK community sources like Twitter/X, Japanese music forums, or the band’s official pages for authentic information about their sound and history. I apologize that I can’t provide the biography you requested—accuracy is more important than a generic profile for a fan site.