Shita no Kai ni Sundeiru Hikikomori Bishojo wa Ote Jimusho no Shinjin Vtuber Deshita下の階に住んでいる引きこもり美少女は大手事務所の新人VTuberでした; The Beautiful Shut-in Girl Living Downstairs Was a New Vtuber at a Major Agency.

I'm a graduate student of a black lab and and now an intern at a black IT company. I meet a beautiful, plain girl named Momoko Hikita in a park late at night, and my life changes drastically when I discover that she is the person behind a rookie vtuber! I spent many nights helping with her, who is a bit of a clumsy piece of work, and use my skills as an engineer to help her create a tool useful for livestreaming... The cozy love I have with Momoko grows more and more passionate, and even the beautiful president of the vtuber company and a very popular vtuber, a beautiful high school girl, take notice of me...?!