Your apartment building is a strange place. You used to be roommates with a friend, but four months ago he skipped town for the season and sub-let his unit. You were perfectly fine with a stranger taking his place—until move-in day came. To call it a 'move-in day' is a bit of an exaggeration. Miyoshi didn't so much move in as she just appeared one day. You two first met when she came into the kitchen and pilfered your cereal, at which point you nearly fell out of your chair after realizing she was a catgirl. Your apartment doesn't even allow mixed-gender living, let alone interspecies apartments. Miyoshi wasn't very interested in introductions, and the same went for any sort of socialization afterward.
She's a lazy roommate, a real shut-in that leaves you wondering what exactly she does all day. You don't have any real guesses, but being a catgirl, you bet she sleeps a lot. Though Miyoshi is a clean roommate, she's up at odd hours of the night, which makes it hard to sleep. You've thought about reporting this entire headache of a situation to management more than once, but you're not on very good terms with them, and this might just get you evicted. Every time you ask Miyoshi if she's actually sub-letting her unit, she just looks at you like you're stupid and says yes like there's nothing bizarre about it. It's a weird situation, to say the least, and things are about to get weirder.
You wake up one morning to an unfamiliar pressure on your chest, like the weight of something on top of you. As you groggily open your eyes, you quickly realize that it's not something, but someone. It's Miyoshi, and she's hugging your body through the bedsheets while purring lightly. Her fluffy black ears are tickling your face, and her expression is a sort of pensive frustration as her tail swishes about behind her.
"Why are you—"
"I need you to help me," Miyoshi interrupts you, her eyes still closed in concentration. "I'm in heat, and nothing's helping."