Constant Variable (Senku x Reader)

4: Weapons of Science

"So, what are we gonna do now?" You asked, glancing at Senku with concern etched all over your face.

Now that you had calm down, Tsukasa being bad news was starting to get to you. If nothing was done about it while you still had the chance, it would be game over for humanity before it even started.

"This guys is seriously bad news." Senku frowned as he paced back and forth on the sand, a deep furrow between his brows. "Then again, if we hadn't woken him up, we would've been killed by the lions. I guess we didn't really have a choice. He wants to help out the youth, too, so I'm sure he'll stay under control until he learns the recipe for the revival fluid."

"That's true," You nodded your head in agreement. "But how are we exactly gonna stop him from getting his hands on the recipe?"

Ruby red flashed with determination as the scientist wore his trademark confident smirk. "Even if it kills me, I have to keep quiet about the miracle fluid in the cave."

"I-I'll do my best!" You stumbled over your words a little, but the resolution could be heard loud and clear in your voice.

The sharp edges of his lips softened into a small smile as the scientist replied, "I have no doubt you will."

His sureness in you had your cheeks flushing a light pink and your heart fluttering with happiness.

"Let's head back to camp before Tsukasa starts suspecting us."

Your gaze snapped up to meet Senku's own. The soft smile still on his face as he reached out a hand out to you, waiting for you to place your palm in his larger one. You accepted and slid your hand into his, intertwining your fingers with his.

"Let's go, Senku."

With that, both of you headed back to camp; ready to face the biggest obstacle in Senku's goal to revive all of humanity.

Time skipped

The closer the two of you got to the treehouse, the more scared you felt. The thought of being so close to a murderer sent shivers down your spine, even though you were technically somewhat safe considering you weren't on his target list.

Yet, the feeling still caused your stomach to churn with discomfort.

By the time, both of you arrived back at camp, you were practically hiding behind Senku's taller frame. You were sticking to him, your hands clutching onto his shirt in a tight hold, refusing to be even a millimetre away from him.

You could hear the amusement in his tone as he teasingly said, "You sounded so brave back on the beach. What changed your mind?"

"S-Shut up," You tried to sound annoyed, but the trip in your words lost that effect. "Besides, it's totally normal to be afraid of this situation."

You didn't have to look to know that he was smirking. "I feel perfectly normal."

"You're different because you're not human." You rolled your eyes, only to let out a squeak when you saw Tsukasa from over Senku's shoulder.

"(Name), Senku," The long-haired male greeted, his eyes boring into the two of you.

The scientist ignored Tsukasa and simply walked past him without a single world while you gave a tiny nod in return to acknowledge his presence, still clinging closely to Senku. Brown eyes glimmered in the afternoon sun as Tsukasa graced you with a gentle smile.

You had to resist the urge to ran for the hills when you remembered how behind that smile was someone with murderous intentions.

The atmosphere was charged with uneasiness as no one said anything, the silence hanging heavily in the air as Tsukasa refused to take his eyes off the both of you – like a predator waiting to pounce on his prey within the tall grasses of the wild.