Undyne had sent you a letter... a very passionate letter that contained her true feelings towards you.

It was strange. You're someone she hadn't met long ago at all. In fact; you weren't even from the underground. You were an outsider, yet in the short time she knew you, she had grown to admire your strength, your determination, and the way you always put "100-Perfecent Maximum Power!!!" into everything you set out to do.

She didn't care if you were a human or a monster or something else entirely, she wanted to get to know you more.

And what would be a better place to do so than the Garbage Dump located within Waterfall? It was her favorite place to hang out. Everything that humans threw away from the surface would flow down here. It was always fun to rummage through it all and find some neat stuff; be it human world technology. Sometimes they'd even find anime and manga (or as Alphys called them; human history).

Undyne stood there, not dressed in her battle armor, nor dressed in her casual attire. Instead, she had gone through the effort to stylize her hair to look more alluring, put on makeup, and wear an ensemble more suited for a night out opposed to battle.

The fish monster grew anxious before you finally arrived.

"Hey!! There you are!! Heh, so you had the guts to come after reading my letter, huh? And here I thought you got cold feet. I got the whole night planned! First, we'll go garbage diving to see what cool human junk we can find. Then, I'm taking you to Grillby's, but if you want something fancy I can take you to that resort restaurant owned by Mettaton. My treat!"

Lucky for Undyne, Papyrus's brother Sans showed her some "Short cuts" so she could get to Grillby's or the MTT Resort faster to avoid trudging through the frigid cold of Snowdin or and the scorching heat of Hotland for long.

"Either way, we're going to hang out. We're going to have a good time. We're going to get "Closer". You'll become so enamored with me that you won't want tonight to end! Fuhuhuhuhu!!"