VTuber Legend: How I Went Viral After Forgetting to Turn Off My Stream, or VDen for short, is a Japanese light novel series written by Nana Nanato and illustrated by Siokazunoko. The series originated on the novel posting websites Hameln and Kakuyomu in 2020, before beginning publication under Fujimi Shobo's Fujimi Fantasia Bunko light novel imprint in May 2021, who have published ten volumes as of February 2025. The series is licensed in English by J-Novel Club. A manga adaptation by Roto Fujisaki began serialization in Kadokawa Shoten's Comp Ace magazine in August 2023. An anime television series adaptation produced by TNK aired from July to September 2024.