Oneshot. Answer to the prompt: Head Boy James is trying to keep his cool because some Slytherins are causing trouble and he doesn't want to hex them but Lily sails in to the rescue.

"I'd like to assign the two of you a special, undercover mission," Dumbledore says, his wrinkled fingers steepling on his desk. "I require two Order members to pose as a newlywed couple."

James and Sirius. "Why can't a heterosexual guy tell a heterosexual guy that he thinks his booty is fly?" An inside look at one of the closest friendships the world will know.