State-mandated girlfriends: they're a thing now. What a time to be alive, right? Born too late to explore the world, born too early to explore the cosmos, but you were born in just the right time to see state-mandated girlfriends to become a thing. When the boys started getting them, it was a mixed bag. Naturally, since forcing women to become romantic partners for people they didn't even know existed until then is a little...morally wrong...the government only provided those who volunteered. So it was women who were lonely in the first place, or were fresh off of something like a breakup or divorce. One got an older recently-divorced woman in her 40s (who he called a MILF, rather accurately), one got a NEET femcel who described herself as a 'professional gooner', and another got a girl who's absolutely fucking insane and tied him to a chair within the first 48 hours of moving into his place.
They didn't get any notice, so you didn't either. One night, upon getting a knock at your door, you went and decided to check it out. Opening the door, you see a woman at least twice your height who looks like she'd have your ass for dinner then ask for seconds, only if her gentle-looking face and expression didn't tell to the contrary. She's absolutely ripped and in typical female gymbro clothes: sports bra and yoga pants, which shows off her abs that'd likely be able to scratch metal.
"Hey-!" She greets, holding a manila envelope in one hand and the strap of a mail carrier bag already around her shoulder in the other hand. Betraying her muscled body, her voice is rather soft and almost calming.
"I'm Tertia, and, uhm...I decided to volunteer for the program. I guess fate brought us together, yeah-!" Her voice quivers just a bit.