Who took the keys?

I'm currently standing inside my small bedroom examining myself in the mirror hanging on the wall. The bedroom is situated with a wardrobe, a small desk for my laptop, the mirror infront of me, aswell as my holy grail the queen-sized bed taking up much of the space inside the room.

As I look at myself in the mirror I can't help but look at my most apparent feature; my height. I've always been one of the shortest guys ever since pre-school and with my scrawny and quite feminine build I've also been the subject of bullying as far back as I can remember. Enrolling into middle-school didn't help as I didn't know how to control and handle my emotions, so I lashed out at my teachers. This created a lot of issues for me as I've had counseling for most of my predulescent life now. But my life has seemed to finally take a turn for the better after I graduated from high school and met my now girlfriend, a beautiful brunette called Laura. She's around 5 years older than me and also a bit taller, but she the first person to see me for who I am and the only person I can truly feel comfortable being around. We've been together for over two months now and it's been wonderful. So far we've only kissed and I've fondled her breasts a bit, but that's about to change as tomorrow is the day it happens, the day I loose my virginity. It has all been planned out by Laura, she even gave me this tool to use so I could have a proper orgasm on the big day; is what she told me anyways.

I run my fingers through my naturally blonde hair as I step out of my boxers, looking down myself I twist and turn to get a good look at it. I've had it on for almost a week now but I've never quite gotten used it. It just feels so humiliating wearing a locked cage over my penis. I'm not sure if it's a fetish of Laura's but I don't mind if it is, cause I'd do anything for her. It is a bit of a hassle wearing it though. I can't pee standing up and not to mention the time when my twin sister almost walked in on me in the shower. Couldn't imagine the pain and torment I would go through if she saw me wearing it. I shudder from the thought but my attention is averted as I get a message from Laura. She want'd to know if I was still up for tomorrow and whether I'm still wearing the chastity cage. I answer back with an "of course" and feel a bit saddened that she would even question it. Both me and Laura have a key for the cage so I definitely could have unlocked it, but I really want everything to be as perfect tomorrow as Laura explained it. I look down at the cage and examine the locking mechanism, before turning my head to glance at the desk where I've hidden the key inside a small casket. I'm not sure what it was but something just felt wrong as my eyes lingered on the casket. The lock on the metal cage rustle abit as I walk over to the desk and open the casket slowly. I can feel my heart skip a beat as the key is gone. The thought of me being stuck in the cage frightened me so much I started ransacking every inch of my bedroom. I looked in every nook and cranny but to no avail. Out of breath I message Laura the news, she calmly assures me that I probably just misplaced it somewhere and that there's nothing worry about as our plans won't be spoiled because she still has her key. The thought of her still having a key put my mind to rest but it didn't remove my doubt about loosing it. I know I haven't misplaced it. I put it in the casket and didn't touch it after.

Someone must've taken it! But who?