You were a Mermaid. You swam around in the tank. For all you knew you were taken in by W.D Gaster.

He was a nice guy. At least he wasn't one of THOSE inhuman creatures.

You are basically an endangered mermaid. A lot of people murdered mermaids only for their fins or kept them in zoos.

Gaster wanted to study you. That didn't mean physical stuff will happen.

He took me in because You were endangered.

You were going to stay here.

You wore a T-shirt. You told Gaster you were uncomfortable with your body exposed. So he gave you a T-shirt to wear.

Things were normal as you were reading a waterproof article in the tank. Until you met a certain skeleton.

"Y/N, I want you to meet Sans, he's going to watch you and study you when I'm busy." Said Gaster.

You waved. "Hello." You said.

"Hey," Said Sans as he held his lazy grin.

"Y/N I will be right back. I have a meeting to attend to." Gaster went out of the lab room.

"Hey, typical gaster am I right?" Said Sans as you laughed slightly of what he said.

"Yeah, typical gaster," you said. He blushed at the sight of you. But he looked at his paper.

You both got to know each other very well. Sans told puns. You laughed at them.

You even made puns yourself. You've grown feelings on Sans.

-few months later-

You swam around as sans approached you. "Hey Sans." You said. He waved.

He was blue for some reason. "Hey Y/N, I'm got something to tell you."

"Yeah?" You asked. "I like you." Said Sans. Your face was red as a tomato. "I-I like you t-to..." you said.

"Really that's great. Well i have finished on letting you breathe in the surface of air. So you don't have to breathe in marine tanks or water." Said Sans.

The glass was open. You swam to it and put your face in and kissed Sans teeth.

Sans was so blue. He was so shocked. He carried you and sat you on a stool.

He slowly kissed your lips as he pulled back at some point.

"I love you Y/N."

"I love you to.." you said smiling softly.