Masato Kasakabe has a miserable job that's constantly overworking him.
His sole pleasure is supporting his favorite vtubers.

"Ahh, if only my oshi jumped through the screen right now..."

Masato starts fantasizing about living with his oshi.
But that could never happen for real...

Until suddenly, he ends up with three of his favorites as his roommates.
With vtubers now existing in the flesh, a dimension-spanning love story begins now...

A contract with the (surprisingly frugal) vampire noblewoman

To help with finances while Masato looks for a new job, Ruby gets a part-time job.
Despite the struggles, the two of them do their best to support each other at work.

But then Ruby notices a new feeling budding inside her, something she's never felt before...

[From Steam]