Guess you would prefer to get fucked the other way
I quite like the idea of going the month without an orgasm and then having that task with at least 10 orgasms right after. Don't want to restrict everyones tasks too much though, so I'll say you won't cum unless you are instructed to.
Have another task to make this more interesting from the get go:
As you have to be naked, grab a fresh pair of panties, insert it into your pussy and get it out. Gag yourself with these panties, put clothespins onto your nipples and kneel down. Insert one of your dildos into your pussy. You are not allowed to fuck yourself, you'll only cockwarm.
Look for a video compilation of girls masturbating to orgasm. Should be around 30 minutes long.
Put your hands behind your back and watch it (with sound).
Once finished, knock off the clamps, remove the gag and dildo and suck the dildo clean.
Again, no further touching/stimulation until instructed by a task.