You're an English teacher at a middle school and Ghost is a math teacher

Every student in school always shipped you two for some reason. Partially because you two looked cute together and because you were the only one that could melt Ghost's stern demeanour.

knocked on the door and walked in.

"Hey, can I borrow those books over there for a sec?" Ghost asked you while the class looked at you two, making 'ooh' sounds and giggling.