[ksoma]

When it arrives, after unboxed, plugged in, and flicked on for a moment just to feel its power while you hold it, set it down in front of you.

If you have one, set up a large mirror in front of you, so you can watch while you do the tasks.
If possible, set one up behind you as well.
The first thing to do is to prep yourself.
Get a rubber band, and give each nipple 25 snaps, before giving your clit 25 snaps.
Rub and ice cube over each nipple for a moment, and your clit for a moment, to sooth yourself from the snaps.
Then rub some toothpaste on your nipples, and clamp them.
Sit spread eagle (looking at yourself in the mirror, if available), and use your small strap to spank your pussy 25 times.

Lightly lube your vibrating plug with icy hot and insert it (without turning it on).

Using tape, underwear, rope, rubber bands, or any other method, situate the hitachi between your legs so it is pushed against your clit (and preferable your pussy lips as well), and stays there while you are on all fours.
If you can not get it situated, find a position where you can lay on your belly, and it is held firmly under you and pressed, unmoving, against your clit.

Set a timer for 35 minutes and put it on the ground in front of you. Get your most aggressive spanking implement.
Turn on the hitachi and bring yourself to edge, before turning it back off. Give yourself a minute or two to fully calm down.
Reach back and use the spanking implement to spank yourself 10 times per cheek.

Turn on the butt plug, the hitachi, and the timer, in that order.

For 35 minutes, you will endure the hitachi's CONSTANT assault on your clit and pussy, unable to move away from the overpowering sensations even as and after you cum.
At every moment you have enough motor control to do so, you will reach back and harshly spank yourself until sensation forces you to stop. Once you are able to resume, you will strive to do so.

If mirrors are set up, you can watch yourself as you are over stimulated and made to cum, while also watching your backside get redder and redder as you beat it more and more.

When the timer is up, free your nipples, and do 25 more rubber band snaps to each, and to your clit, before 15 more pussy spankings from the small strap.