Yuumei VTuber no Ani Dakedo, Nazeka Ore ga Yuumei ni Natteita

For most people, having a sibling who is an internet celebrity might seem like a distant, amusing novelty. For our protagonist, it is an everyday reality, albeit a quiet one. His stepsister, Isuzu, is the cheerful and immensely popular virtual YouTuber known as "Isuzu Wine," a digital idol whose channel boasts over a million devoted subscribers. He has always remained a shadow in her bright, virtual limelight, content to live a normal life away from the camera's gaze. However, his comfortable anonymity is shattered in a single, horrifying moment when Isuzu forgets to end her live stream, broadcasting a private, candid conversation between the siblings to her massive audience. The clip of their unguarded moment explodes across the internet, turning him from an anonymous bystander into an overnight sensation. Suddenly, he is thrust into the chaotic and demanding world of online content creation. The more his sister's accidental blunders occur, the more their popularity seems to skyrocket, creating a bizarre and stressful dynamic. Now, navigating the treacherous waters of sudden fame, he finds himself caught between his overly affectionate and clingy stepsister and the attention of a cute, senpai VTuber. Together, this unlikely trio must learn to work as a team, striving to climb the ranks of the streaming industry while managing the pitfalls of viral fame.