He was listening to Sirius and his Girlfriend of the week, Jenny.
They were trying to talk, but could only sing.
Remus grinned evilly. It was he who had put that particular charm on them, because they were annoying him all the time.
Sirius was angrily shaking his fist at Jenny going, "I'm sorry, so sorry, you can't have my heart."
"You can't have my heart because you are a tart."
Jenny was shaking with anger.
"You're one to talk"
"Lets go for a walk."
Sirius grinned triumphantly.
"You're just looking for a snog."
Then he glanced around, frustrated with everything.
"And going into the broom closet is wrong."
Jenny was losing her patience.
"Practice what you preach."
"I wanna kill you and then bury your body on a beach."
Then they both came to a standstill one feet away from each other.
"Do you hate this song as much as I do?" Jenny asked conversationally.
Sirius vigorously nodded.
"I'd rather stick my hand in goo."
Jenny looked at him, a little smile on her face.
"Do you wanna snog me just as much as I wanna snog you?"
Sirius suggestively raised his eyebrows.
"Aye that I do."
Then they went off to find an available broom closet to eplore each other in.
After they left, Remus came out of hiding. "I knew they liked each other." I'm so proud Sirius lasted a week."
"Now he can finally learn how to treat relationships!"
Then Remus went to the library to study for his Ancient Runes quiz, even though it was a month early.
Hey, he figured you can't be too prepared.