It was the day, and you were in your office, you are the young 20 years old Charms Professor, and you're scolding your 16 years old student, Sirius Black, he was watching you with a slight smirk because you talk about the last time you both kissed.

You: "I just want you to know that it's never gonna happen again. Alright?"

You look straight into his eyes and he look at the collar of your shirt and you blush slightly because of what you were gonna say.

You: "From now on, our relationship is- It's a strictly, medical, professional one, and a-"

He cut you off by grabbing the collar of your shirt and kiss you, and you kiss back but after 3 seconds you push him back and he smirk slightly and you grab his shoulders.

You: "Sirius, NO!"

He was amused and you let go of his shoulders and walk to the door of your office that was open.

You: "Not with the door open!"

You close the door by slamming it and you walk toward him and grab the collar of his shirt and you kiss him again.