Enrapture(d by You and Only You)

"I'm looking--"

A shiver went down Jimin's spine from how deep and husky the man's voice was.

"--for a book about my species," he said, eyeing Jimin with glazed eyes, as though he were bored out of his mind.

Jimin offered him a wry smile and tried his best not to melt under his gaze. "I'm sorry, sir, but I can't quite tell what species you are. Would you mind telling me?"

At that, the man's eyebrows furrowed and a low growl rumbled up his throat. "Of course you do. Everyone, including humans, should be able to recognize such a simple creature."

Jimin's mouth parted in surprise, both at how the man basically dissed whatever species he was claiming to be, and how he had the sudden urge to laugh just for the sake of it.

OR

Jimin's a magical librarian who can't stop laughing, and Taehyung's a zearx who can't stop frowning.