Silva was awake but didn't step out of her bed. Emely was away, probably making breakfast while the blind girl reminisced about last night with her eyes opened. She couldn't stop thinking about Silv's words, something would happen at the end of the week.

"Six days left..."

The day continued like any other, Emely worked on her time travel device while Silva joined her two partners for their next mission. The three friends were waiting in their leader's office for a few minutes until the screen lit up. The leader seemed tired, almost like she didn't sleep all night.

"I know it's a slow day but we have things to do. Emely asked to get a special type of steel that we can only find in one world. I'll let her explain everything but this won't be like your usual missions."

"Can I say something first?" Silva shyly raised her hand, visibly concerned about something "Last night, Silv came to me. She said that something would happen soon."

"She did?" Polyetta stayed silent for a moment, worried about what she planned "Neige, Sepide, you should go see Emely. Silva will explain everything she knows for now."

"Okay, keep us updated on that." Neige left the room, followed by Sepide. He wasn't sure what Silv was about to do, but he knew it would be their chance to finish it once and for all.

The two friends entered in Emely's lab, making sure to knock this time. Once they entered, the engineer stopped working on her things and went to get something from her closet. It looked like a uniform scuba divers would wear, surprising Neige.

"What's that? Are we going underwater?"

"The leader didn't tell you? I need a stone called lapisium, it's a shining blue crystal that will allow us to create our time anchor. And the only place we can get it is the world 0... 3..." Emely took a paper out of her pocket and hurried to read it "11100850. It's a world made only of water, None of you are dolphins, so you won't be able to breathe underwater."

"I think you mean that we aren't fishes, dolphins can't breathe underwater."

Emely threw the uniforms at Neige and took metallic bottles to throw them at him. Neige managed to catch them but had difficulties holding on.

"Since when are you a marine biologist? Anyway, you're like dolphins, you can't breathe underwater. Those bottles give you twenty-four hours, no more but maybe less. If you feel like you don't have time, go back on the ship, I can fill them quickly."

"Twenty-four hours?" Sepide looked at the bottles, barely bigger than a water bottle "They look like they will last less time than that."

"I'm not a biologist, but I'm an engineer. I know how much air you consume."

Neige wanted to tell her that a biologist would know how much air humans need, not engineers. Despite his wish to do so, Neige stayed silent, barely managing to hold all the stuff in his hand.

"We should go get Silva now, how can we make sure it's lapisium?"

"I'll send a picture on your phones, and don't worry, all your equipment is already waterproof. Good luck with your mission, and take care of SIlva for me."

Sepide and Neige nodded and went out of the lab. They hurried to prepare themselves and find Silva to jump into this new world.

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The three friends stared at the vast ocean in front of them. The only thing that protected them from the water surrounding them was the uniform made specifically for this occasion.

"blrblrblrblrb." Silva made strange sounds like she was drowning. Sepide hurried to go see her with worry in her eyes but stopped when she saw her friend laughing instead "I got you! But seriously, you'll need to guide me, I have no idea what the fluff is going on."

"I guess it's hard to pay attention to your surroundings without clear sounds." Neige looked around, searching for a place where the stone could be "I don't see anything interesting here, we should walk around."

"Can't we swim?" Asked Sepide "It seems faster."

"We could, but then Silva will be completely lost and we'll need to slow the pace for her. We'll just need to do like slimes and walk at the bottom of the ocean."

"Slimes do that?" Asked Sepide "I never saw any."

"In my world they did, anyway, let's get going. We don't have infinite time."

The two girls nodded and followed Neige into this empty blue world.

The sound of the wildlife swimming around relaxed the three friends. They jumped just as if they were on a moon, slowly hopping closer to their goal. They continued that way for an hour but didn't see the time pass in this calming atmosphere. The only thing that brought them back to reality was a strange creature swimming in front of them. A woman with a scaly tail and a fin instead of legs. The woman looked at them with curiosity, repressing the urge to touch them.

"You look like my kind but... You're so different."

Neige put his hands in front of his helmet and closed his eyes, visibly embarrassed.

"Is it normal for your kind to... Not wear bras?"

"Bras?" Asked the woman, confused "Is it this weird outfit you're wearing?"

"Nah, don't mind him, he's allergic to natural feminity." Silva tried to focus the best she could to feel if there was anyone else but hardly could because of the water "Are you alone? It seems lonely in here."

"Well... I'm pretty alone. My kind rejected me long ago." The woman swam around the group to look at them from every angle, curious to know more about them "You look so strange, did something happen to your tail?"

"No, we are just born like that." Explained Sepide "We come from another place, far away from here. We're searching for a blue stone, have you seen it?"

"A blue stone..." The woman thought for a moment before nodding "Yes, I can guide you to it if you want. My name is Venus by the way."

"I'm Sepide, and these are my friends, Neige and Silva."

The woman smiled at them and guided them to the crystal they were searching for. The three friends were glad to find them, their mission would have probably lasted longer without her help.

The group arrived in a strange cave, the rocks were shining brightly. Neige searched but couldn't find the one they were searching for. The woman stayed behind them and started singing with her soft voice. Neige and Silva were a bit confused and turned toward the woman only to see her and Sepide leave together. Neige wanted to follow them but decided to stay with Silva instead. Sepide could manage alone, unlike Silva who needed someone to navigate. The blind girl wasn't sure about what happened and turned toward her friend.

"Did Sepide leave? She found the crystal?"

"I doubt it, I'll call Emely, she should be able to track her."

Neige hurried to call the engineer. It took a few minutes until someone picked up.

*It's Gwyn, Emely asked me to answer for her.*

"Gwyn? What are you doing in Emely's lab?"

*I wish I knew, I think she uses me as a test subject.*

"That's... Concerning. Anyway, can you ask her to locate Sepide? She randomly left us to follow one of the persons of this world."

*A person?* Gwyn paused for a moment, visibly surprised *I thought you went into a world with water everywhere.*

"Yeah, but there was this fish lady and-"

*With a tail instead of legs?*

"Yes, you know them?"

Gwyn left the phone for a moment. It was barely audible, but the sound of a conversation between Gwyn and Emely could be heard until the doctor came back to the phone.

*Emely will send you Sepide's location. This creature is probably a siren, using its voice to lure people and manipulate them.*

"Really? I didn't feel anything from her voice, and neither did Silva."

*Maybe you're different somehow, it's possible that Sepide had a weaker will than you two.*

"That's annoying, and why do sirens do that?"

*It depends, could be because they're lonely. But most of the time, it's to eat their victims and take their possessions.*

"What!" Silva stepped back and almost fell because of the strange gravity of this world. She managed to stabilize herself despite the shock of the doctor's words "We need to go save her!"

*Yes, you should. Be careful with them, they look innocent, but they won't hesitate to betray you when they can.*

"We'll go right away then." Said Neige "I just hope we won't arrive too late."