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A Vietnamese-American former gay pornographic actor and director. Best known for his BDSM works.
In the NicoNico and Gachimuchi fanbase, he is popular next to Billy Herrington as an internet meme. In Chinese Bilibili, he is the most popular Gachimuchi character.
Japanese fans call him TDN (TaDaNo) Kosugi (in reference to Tadano Kazuhito from Manatsu no yo no Inmu) or Van-sama, while Chinese fans often call him as Dungeon Master
His sound was used in almost every Gachimuchi video as instrumental, including his famous phrase "Fuck You" that he replied to Mark Wolff after getting mocked for his leather outfit.
His popularity in China is very high, to the point that he was invited to SKY Anime festival in Shanghai, China, in 2019. He's also created his official Bilibili and Twitch account as well.