Une étudiante coquine se venge

Just so you know, it's revenge time, and there you'll sit, tied to the chair. You're not going anywhere at all. Now, be quiet! No? Fine. I'll use this ball gag, then. Open wide! There... I'm going to have fun with you, but I don't think that ball gag is effective enough. Perhaps some duct tape would help. Yes, three strips should do. Hmmm... I think you need more. Not duct tape, though. Bondage tape! And not over your mouth. Can you guess where?