There is a certain comfort in not having to be perfect. If your partner has a pile of clothes on their chair, you don't feel guilty about leaving your notebook on the floor.
It sounds like you've encountered a file with a very specific, evocative title—likely a fan-fiction, visual novel, or a piece of creative writing that blends the mundane with the intimate. Everyday.Sexual.Life.with.a.Sloven.Classmate.rar
A "slovenly" character is, by definition, low-maintenance. They aren't trying to impress you. What you see is what you get. In a world full of performance, that honesty is intoxicating. There is a certain comfort in not having to be perfect