You enter Waterfalls. As expected, an armoured civilian walked around. She takes of her helmet, pushing red hair into your face. She notices, and pulls back immediately.
"Oh! (Y/N)! Sorry! Didn't see ya there. It seems we're the only ones underground..." She walks close to you, making both of you blush.
"Wanna rob every store in Snowdin?" She says, smiling.
"Uh... ok?" You say.
You and Undyne walk throughout the Underground, taking money from places like inns and Grillby's. The coldness of the area made here want to take her armour off.
"Hey... uh, your not to bad. At robbing, I mean." You say to Undyne.
"Oh, shut up! I've done this for years, by myself at least..." She says, blushing.
"Who said you have to do this alone?" You take Undyne's hand in your own. "Adventure with me! Be with me for the rest of our lives!"
"(Y/N)... I can't believe it. I've felt like this too!" Undyne says, jumping into your arms. You push her so that she's close to your face, pushing her pants against the bulge in your pants. Then, you tenderly kiss her, exploring every part of her mouth. She then releases.
"Come here. There's a special place we should go. It's to cold for what I'm going to do to you."
What? Yall are enjoying this? Ok Austin. Thanks for the idea. let me know who ya'll wanna smash next. See ya!