Why? • Gaster!Sans x Human!Reader

Chapter 3- A Strange Place

You lay on your bed, staring at the ceiling. The room was completely dark. You sigh quietly.

"You still thinking about that basement?" Flowey says.

"I thought you were sleeping." You say.

"Nope."

"Oh."

There's a silence, but Flowey breaks it.

"So were you thinking about the basement?"

"I was actually." You say honestly.

It had been a month since the ball rolled down those stairs. The basement was almost calling you, you couldn't stop it.

"Well you might be able to next week." Flowey says out of the blue.

"What?"

"It's your birthday, your turning 18."

"Oh, yeah..." You had forgotten your birthday.

"Maybe if you ask mum in the morning she'll say yes. Although I seriously doubt it..." Flowey says the last part quietly but you still hear it.

"I would be 18, I can look after myself, right?"

"You can here, but you don't know what's down there."

"Mum wouldn't keep anything dangerous down there, would she?"

"I don't know."

"Well you can just go down the-"

"I can't 'just go down there.' Do you want me to die?"

"No bu-"

"I wouldn't go down there for anything."

"What if there's something important down there? I feel like the basement is calling me..."

"That's called curiosity."

"What about when I wasn't here? Did mum ever mentioned it?"

"Well..."

"Spit it out Flowey."

Flowey hesitates for a moment, but decides to say the truth.

"Well mum told me that at least 7 humans have been here..."

"What!? Where did they all go."

"She said that they all wanted to leave the ruins, go back home. She said that ASGORE probably killed them and took their soul. She said she didn't want too lose another one..."

"Who's ASGORE?"

"Don't worry about it, I've probably said too much anyway. It's not like he's important or anything, hah. Like I've never been outside the ruins. Totally. What I didn't say anything! Hah. Ha. Heh." Flowey says really fast.

You shrug it off.

You were going to get into that basement no matter what.

"Do you want to go back?" Flowey says in a serious tone.

"This is my home now. I can't turn back."

"What if there was a way to go back? Would you?"

"I-I dunno. I still feel guilty for running off like that. It was selfish of me..."

"Don't ever think that. They were gonna do experiments on you. I've seen your power, it's incredibly strong. Those people won't use it for good- they'll use it for war."

"Your probably right..." You mutter.

"If anything, you did the world a favour."

You sigh. Flowey was pretty accurate with all this. They would have used that power the kill others.