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Kai Angel
Dmitry Olegovich Itskov was born on February 4, 1997. He grew up in Israel. Prior to starting his music career, he shot music videos for artists such as Boulevard Depo, Saluki, HammAli & Navai, and others. Later, Dmitry began releasing his own tracks under the pseudonym zavet, experimenting with industrial and decadent sound.

9mice
Sergey Igorevich Dmitriev was born on August 27, 2000. He began his musical career under the pseudonym DIMAIS, creating trap tracks in Vladivostok. Later, Sergey moved to Barcelona, where he worked as a model and continued to develop his musical career.
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In 2022, Kai Angel and 9mice met online after discovering similar tattoos with the word "angel" on their necks. In 2023, they released a joint album Heavy Metal, presenting their vision of the "Russian rage" to the Russian audience, inspired by the work of Playboi Carti.

The name of the association comes from the name of a nightclub in California, the Viper Room.:

Kai Angel: I saw a huge black wall, and it says Viper Room on the facade. I wrote down this phrase for myself, I thought: “What a beautiful image, maybe I should use it somewhere?And then I found out that this is a legendary place, a lot of things happened in it. In general, we liked the word.

In December 2023, Kai Angel and 9mice, together with actor Yaroslav Mogilnikov, presented Kanye West's new merch created by Gosha Rubchinsky

In 2024, the duo presented a sequel, the album Heavy Metal 2.

In the same year, the duo was nominated to the Forbes magazine "30 under 30" list⠀⠀⠀⠀⠀⠀

The artists were united by their love of Western culture, their disdain for the Russian rap scene, and their passion for high-fashion trappings.
Viperr's first joint release was called Heavy Metal and was inspired by the Playboi Carti label.
The Vipers identified themselves as rap dissidents and stated that their vision of music and lifestyle was similar within the band, but beyond the reach of their Russian colleagues.
In one of Viperr's releases, Heavy Metal 2, the artists decided to play with references and diversify the typically heavy sound.
The association broke up. According to the website information the-flow.ru Viperr broke up because 9mice called Kai Angel a fool.
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