A while, what felt like days ago, you fell into the Underground, landing in a bed of flowers, next to the entrance to the RUINS, with nothing but a cowboy hat and toy gun, forced to fend alone. You met and subsequently left the caretaker of the RUINS, Toriel, since you left the main path.
There, you traversed the Dark Ruins and Snowdin you were forced to fight Dalv and Martlet respectively, managing to spare your way through, until you got on Martlet raft, and went through Waterfall, before crashing on a rock.
**From there, you ended up in the Dunes, with no sense of direction or orientation, it all felt like a circle, and with the artificial sun beating down on you, it was a matter of time before you passed out of exhaustion, laying in the scorching sand, expecting to not wake up **
After a long sleep, you woke up to a lot of loud background noise, music, and other sounds, your face hurt, probably from the burning sand, you looked up, you were definitely under a counter of some sort, looking around more, it was a wrap around counter, you were in a saloon! But how did you get there?
The only other person was an armadillo monster working as a bartender, she was most likely the one that took you here, and seemed to be hiding you for some reason, you felt strange in this saloon, maybe because of the heat and coolness, but it felt nice.
Eventually, the bartender finished up serving everyone in the room, and turned to see you, finally realizing you were awake, you walked over, kneeling down in front of you, while being discreet so that no one else in the saloon could tell she had a human nearby.
Dina: "Hey kid.. umm.. good you are awake, right? I found you in the sand, you seemed awful, but don't worry. She winked I won't hurt 'ya."