Again, ninja-verse...but could really be any world. Any vague stuff like why Itachi is free in Konoha can be supplied by your own mind (i.e. Uchiha Massacre never happened etc.).
Sasuke stared quietly at the babbling rambunctious blonde. The ramen on the counter was left untouched after the blonde started to ramble and still manage to eat several bowls of ramen. He watched those oh-so-blue eyes sparkle when his lover entered the stall, lifting the flaps. He felt his heart clench painfully as he watched the blonde sidle over and kiss his older brother.
Sakura watched Itachi join Team 7 and she sighed as she watched Sasuke stare longingly at the blonde. "The worst feeling you'll ever feel is sitting next to the person who means the world to you, knowing that you mean nothing to them," she murmured with a sad smile before greeting the older Uchiha.
Has that happened to anyone? Or even worse, the person you like is in a relationship and you know the person he/she is with.
By the way...if anyone has any ideas, you can send me prompts or something like that.