[Hp]heidi's Secret

Heidi: Professor, can you solve the mathematical equation r=a(1-sinθ)? Snape: It seems that Miss White thought it was her maths professor who was standing before her, not her Potions professor. Heidi drew a heart on the parchment: Professor, it is a heart-shaped line! The arc smoothly depicts the shape of the lover's heart, and finally returns to the starting point. Minimalist formula, complete cycle, eternal whispers of love! Snape: So if I answer this question for Miss White, now am I expressing my love to you? Heidi was exposed and wanted to run away immediately, but was caught by the collar by cold hands. Snape sneered: Because of you, I had to deduct ten points from my college for... Molesting the professor. * Heidi has a secret. She loved her Head of House, her Potions Master. She was going to take this secret to her grave, but who knew that two people would actually sleep in her future grave. One is her and the other is her professor. Heidi: That's careless. [Given the professor's special attributes, this should be a sweet yet sadistic story] Welcome to follow the author on Weibo: Mr. Author Zonggong Intention: