Doorbells
Ding dong.
Katara glanced up from her book, eyebrows knitted in confusion. She wasn't expecting anybody. She walked to the door and glanced through the peep hole and immediately covered her mouth, pressing her forehead to the door and trying to keep her tears at bay. Zuko was home.
"Katara?" she heard from the other side of the door. She let out a sob of relief and joy. She flung open the door and immediately embraced her boyfriend, nearly causing him to topple over.
"You're home. I wasn't expecting you for another week—"
Zuko silenced her with a kiss.
(Zuko was in the military and, well, returning home. I couldn't find a way to work it in in the 100 words.)