I Became A Villainess

I used to be a 24 years old corporate slave in my past life. Without knowing how I died, I woke up as the Villainess inside a game which my friend in past life used to nag about. And since I somewhat grasp this body's future---which is death, I decided to retire from being the heroine's rival and instead focused on living a slow-life in this world of swords and magic game. But as I was leisurely living my life, and unexpected occurrences happened. "This is an order, you are forbidden for marrying." "Hahaha! That's my little sister for ya'." "And who told you to touch my master's bedhair?" "SHE'S MINE!" ---What's going on?