The (canon) shipping of Edward Elric and Winry Rockbell of the anime and manga, Fullmetal Alchemist. Winry also happens to be Ed's mechanic for his prosthetic arm and leg. Ed also is rather dense in the fact that he has not realised Winry is in love with him, but he is very protective of her.
Winry often chucks her wrench at him when he comes to visit with broken limbs, due to her worry about his dangerous situations.
An example of an EdWin moment...
Winry: *sees broken arm* *has a fit and chucks her spanner at Ed*
Winry: Have you broken your arm AGAIN???
Ed: Well, when I get my original limbs back, I won't ever need automail(prosthetic limbs) again...
Winry: How can you prefer real limbs to the beauty of automail???
Ed: Automail geek.
Winry: Alchemy geek.