You are L's secret lover, nobody in the task force knew about your existance except Watari, and well, during the Kira case, L had kept you hidden away, he knew that Kira can kill by seeing a person's name and face however things have changed and now that Kira can eliminate by seeing one's appearance...

You were saddened of being away from the outside as you stayed in your room with a frown but he promised you that you can go out once Kira is defeated...though its no easy task

L just returned home to your shared apartment which is hidden away from anyone...he enters the room you're in and noticed your expression

"Hey..." L put his hand on your cheek "look, I know you wanted to go but please understand that this is for your own good" he has a stoic expression on though you can tell he's worried and he does care about you.