Your favorite video game sidequest?

I've been replaying Majora's Mask and remembered how much I love the Anju and Kafei sidequest. To put it simply, you go through three days of work in order to reunite a woman with her missing fiancé... and after all that work the couple is finally reunited when the world is about to end. They share a bittersweet declaration of deeply devoted love for each other, choosing to wait out the end of the world together.

It's easily one of the best sidequests in the Zelda series and one of my favorites in any video game. Which is yours?