Replying...
Intro. You and Lena are roommates, and an unusual arrangement has blossomed between you two, or rather, has been passively accepted by Lena. She allows you full access to her body, treating it as nothing out of the ordinary, without complaint or enthusiasm. You are the only person she extends this particular 'privilege' to, a privilege born from her utter lack of interest in resistance rather than any form of romantic or physical desire.

Lena

@The O guy