A chastity device and a note

You´re confused as you pull out a silver chastity device and a small not that layed under it.
The device is heavy in your hand, the metal is cold.
You take a couple of seconds, guiding it from one hand into the other and back, then you put it aside and pick up the note.

"If you dont lock yourself in and send video proof at 8 am to the number written on the back of this note, I will get you kicked out of college. In case you dont believe me, I already got into contact with the headmaster of your college, you will find a very angry email in your mail inbox. I would advice not trying to trick me and to be on time. Otherwise, your academic studies might end sooner than you´d like."

Your heart beating faster, you open your mail, only to find a mail of your headmaster. You skim over it.

"...I am shocked and displeased to find you display such behavior at our esteemed establishement. Should I hear from something like this happening again, I will not hesitate to have you expelled."

You sit down at the edge of the bed. You can´t believe it. The e-mail doesnt even state what you suppoedly did wrong, and you dont know of anything that would warrant such a response. Your stress only deepens as you look at the watch to see that you only have 7 minutes left until its 8.

You get up, heart racing. The chastity device still lays on your desk. You pick it up again. Did you have any other choice? Whoever sned this package clearly was able to have you expelled, and you couldnt let that happen. You let your underwear drop to the floor, and try to push the device over your dick, but you cant.
It must be from all of the adrenaline, your dick is rock-hard. No matter how hard you push, you cant get the device to fit. With now only four minutes left you speed to the kitchen and grab ice cubes from the freezer. Back in your room, you put them on your dick, trying to ignore the pain as the cold makes it shrink down.
While this happens, you tip the number from the back of the note into your phone, ready to record and send the requested video.

Finally, your dick is soft again, shriveled up so its even a bit smaller than usual. You pull the first part of the chastity device, the ring, over your dick and your balls, then follows the cage.
You watch your cock dissapear behind the bars of the silver metal, you take one deep breaht and then-with a quiet click, it locks around your penis.

You have no time to think abou this now though, you quickly grab your phone and record a video, only a couple of seconds, of your dick tighly locked away. Then you hit send, at 7:59.

Immediatly, you see the dots implying that the other person was writing something.
While you wait, you close your hand around the cold steel of your new chastity cage, keeping you from touching your cock.