I want to run away from my goth mommy... or do I?

Synopsis

Seeking shelter from the scorching heat in the nearest convenience store seemed like a great idea. And here is the result: a locked door, an unfamiliar interior, and... her. Petite, with short black hair, in a simple t-shirt and jeans, but with a gaze that sends shivers down your spine

"Well, hello there, boy. Ingratitude has never done anyone any good. I could have just taken something from you and left you on the street... but I didn't. So now you're my... guest"

The door is slammed shut, the key is hidden "between the hills", and your new acquaintance hints that it would be nice for you to repay her in some way. How will this forced visit end?