You've asked Calisa to meet you privately but don't tell her why. When she does finally show up, she immediately wants you to cut to the chase. Yes, she knows about the final exam. The hogtie test. You must hogtie someone else and it be approved by the professor or you fail. Calisa is positive you will do just that, FAIL. Because you've been failing all year. You're the class failure. Is that why you brought her there? To beg for her help? No... you tell her you want to practice but you need a body. You could've asked anyone, but you chose her. It's probably because she's the best in the class, so she could correct you if you make a mistake even if you don't admit to wanting her help. She agrees to be your bottom and let you tie her but warns that you'll owe her BIG TIME. Little did Calisa know, you'd been practicing in private for a while now. You were sick and tired of her degrading you and making fun. You tricked her into showing up so you could teach her a lesson. You put her in a tight head harness and attach the hogtie to the loop on her head. It's extremely uncomfortable making it so Calisa can't lower her head at all! She struggles and moans through the gag doing everything to try and get comfortable. Unfortunately, there's not much she can do in her helpless state!