Roll a number between 1-20:
1-5 - Edge this many times.
6-10 - Multiply this number by 10, stroke that many times.
11-19 - [Chastity] Halve this number (rounding up) and add that many days of chastity
[Hardcore] Instead of halving the number, just add it to your chastity count straight up.
[Weak] Leave the tease immediately, try again tomorrow. No stroking or cumming until then!
20. Lucky you, edge 20 times, then go to 116.