Evangelion: the popular series that's hard to write fanfiction on.

Undertale: the popular series that's easy to write fanfiction on.

This fanfiction: is going to be hard to write due to the high risk of OOCness. Seriously, even after watching the films and doing research, I can't get the Evangelion cast entirely right.

I have to go back.

Shinji kept thinking this even though his steps took him further and further away from Tokyo 3. He was currently walking down a nature trail in the country. He never gave his path any conscious thought; his feet just took him there while he secluded himself in his mind.

They're probably looking for me; wanting me to pilot the Eva again.

He had originally wandered around the city, but the noise became too much for him and he moved his wanderings to the country. The sounds of the birds and cicadas were preferable to people. Out here, he was alone.

"I musn't run away"…so much for that.

Up ahead, he could see Mt. Ebott. It had never attracted his attention before, but seeing it on the horizon, Shinji felt a sudden twinge of déjà vu. He felt like he had walked down this path before, and something about the mountain called out to him. His curiosity piqued, he decided to go there.

There were stories about Mt. Ebott, like how children went missing and were never seen again. Old folklore said that they were spirited away by ghosts or demons, but that was all it was: folklore. Even though he had no reason to believe in them when there were Angels to worry about, the thought still lingered in Shinji's mind as he climbed the mountain.

His foot caught something and he found himself stumbling forward. He expected to fall flat on the ground, but he found himself tumbling downwards. Something struck his head and he fell unconscious.

When Shinji woke up, he half expected to see an unfamiliar ceiling. Instead, he saw the stars and the moon high above him. He saw all this through a hole in a cavern. He had to have been out for a couple of hours if the moon was up now. He sat up and noticed that he was lying on a bed of yellow flowers. He also noticed a sharp pain on his head. He rubbed the sore spot and touched something wet: blood. He now worried that he was trapped in the cavern.

He cursed his stupidity for leaving his phone behind. When he left, he didn't want to be bothered by phone calls from Misato, and now he was regretting his decision. Combined with the fact that no one knew where he was, Shinji knew that no one was coming to rescue him.

So I just wait until I die? Is there no other way out?

Shinji got to his feet and decided to look around. The moonlight offered little visibility, but further down, he thought he could see another ray of moonlight. He decided to walk towards it.

In the patch of moonlight was a single, yellow flower. It was bigger than the others, and it had a smiling face. Shinji did not know what to think when he saw it, and he certainly didn't know what to say when it spoke.

"Howdy!" The flower said. "I'm Flowey, Flowey the flower!"

Shinji stared at it in silence.

"Hmm…you're new to the Underground, aren'tcha? Golly, you must be so confused!"

"I…I am." Shinji admitted.

"Someone ought to teach you how things work around here! I guess little old me will have to do. First, you see that heart in front of your chest?"

Shinji glanced down and gasped when he saw a glowing red heart hovering in front of him. He didn't know how he had failed to notice this earlier. He lightly touched it and found it to be warm.

"That is your soul, the very culmination of your being." Flowey explained.

"My soul? But why is it out here?"

"Because that's how it works for humans, unlike monsters."

"M-monsters?"

"Now, your soul starts off weak, but it can grow strong if you get a lot of LV."

"LV?"

"LOVE, of course! You want LOVE, don't you?"

Shinji lowered his head. He did want love, but…

"Of course you do!" Flowey went on. "I'll share some with you!"

Little white pellets suddenly appeared around the flower.

"Around here, LOVE is shared through little white 'friendliness pellets'. Now, try to catch as many as you can!"

Before Shinji could question it, the pellets flew towards him. Out of instinct, he moved out of the way. Flowey narrowed his eyes at this action.

"Hey, why did you move?" He asked.

"S-sorry."

"Well, try again."

More pellets appeared and flew towards Shinji. This time, he allowed them to make contact with his heart. Pain suddenly overtook him and he dropped to his hands and knees. His chest ached and felt like it was about to burst. He looked at Flowey and saw that his cheerful smile had turned into a malicious grin.

"You idiot." Flowey said. "In this world, it's kill or be killed. Why would anyone pass up an opportunity like this?!"

Shinji gaped as a ring of pellets appeared and surrounded him. He was in too much pain to get up and run. Instead, he could only stare at Flowey disbelievingly.

"Why?" He asked.

"Die."

The flower laughed as the ring of pellets slowly closed in on Shinji.

Move! Move!

Out of nowhere, a hovering ring of fire appeared and closed in on the pellets. As soon as they had made contact, they both vanished. A fireball flew from the far end of the cavern and hit Flowey. He shrieked in pain and sunk into the earth. From the darkness, a lone figure stepped out.

She moved and looked like a human, yet she had white fur and a goat's head. She wore white and purple robes and had a worried look on her face. Shinji knew that she was the one who had saved him.

"What a terrible creature, torturing such a poor, innocent youth." She said. "Do not be afraid, my child. I am Toriel, caretaker of the Ruins."

"T-thank you." Shinji said. He tried to move again, only to be met with more pain.

"Here, let me help you."

Toriel approached Shinji and knelt in front of him. She reached out and lightly touched his soul. Though he flinched at first, he could feel a wave of soothing energy flow throughout his body. The pain melted away and he was able to stand up again.

"You are the first human to come here in a long time." Toriel said. "Come. I will guide you through the catacombs."

Toriel walked back into the darkness. Shinji hesitated. Yes, she had saved him from Flowey, but how did he know she wouldn't try to kill him, too? In the past minute, he had discovered that the old folklore of Mt. Ebott was true. There were actual demons—no, monsters, in this Underground.

And no one was ever seen again…

"Are you coming?" Toriel called out.

Shinji decided that following Toriel was better than standing around and waiting to die. He followed her and kept his guard up. At the first sign of danger, he would just run away.

That's all I'm good at anyways…