Constant Variable (Senku x Reader)

Prologue: Darkness

That day, everyone in the world turned to stone and humanity was plunged into eternal darkness.

***

"Listen up, Senku!"

The door to the science lab slammed open, startling you and you lost your balance, your arms flailing as you fell off the chair which toppled onto the floor with a loud crash.

"Ah!" You let out a cry of pain as your ass hit the hard ground, pain crawling up your spine starting from the tailbone.

Senku winced at the sudden loud noise being so close to his ears before stopping what he was doing and peered down at you, his brows furrowed in slight concern although his words were contradictory to what he was feeling. "Geez, be more careful, will you? How clumsy can one be?"

"Sorry, it's just that Taiju scared me with his sudden appearance since I wasn't expecting it at all." You groaned and pushed yourself into an upright position, rubbing your sore back.

Taiju who wasn't' aware of what just happened went on as he entered the science lab, his words causing everyone else in the room to gasp in shock. "I've made up my mind. I'm going to confess the feelings I've had for Yuzuriha for the past five years!"

"Yeah?" Senku replied in a disinterested tone as he stretched out a hand towards you which you accepted, pulling you to your feet. "Well, that sure does sound interesting. I'll be cheering for you so hard that my vocal cords snap. From here in this science lab."

You were smoothing down the front of your school skirt which was slightly rumpled from the fall when you heard the sarcasm in your friend's voice. Hissing, you elbowed the scientist in his side. "Senku! Don't be so rude!"

"Tch!" Senku let out an irritated tsk as he turned his head away from the disapproval frown coming from you.

Turning towards Taiju who had just noticed your presence, your lips quirked up into a smile in encouragement. "Ignore him, Taiju. I'll definitely support you even if Senku doesn't. Although, both you and I know that he does care from the bottom of his heart."

You stuck your tongue out childishly when Senku turned and glared at you, not pleased with your words because he simply doesn't do emotions being the logical person that he was.

Taiju, unaffected by his friend's way of speaking considering this was how he always spoke, rushed forward with his fists clenched in eagerness. "You will? Thanks, Senku!"

"Shut up." Senku stuck one finger into his right ear, wincing slightly at the loudness of his friend's voice. "I'm not cheering one millimetre for you, you big oaf."

"What?!" Taiji's eyes blinked in disbelief. "Make up your mind!"

You shook your head at the green-haired male's bluntness, feeling slightly sorry for Taiju who just had the worst luck when it came to making friends. 'He's hopeless, that idiotic scientist.'

Although, you shouldn't say so much as well since you could be considered as one yourself for falling for someone who you could confirm, confidently with ten billion percent, would never return your feelings considering he didn't have the brain capacity to deal with such tacky emotions such as love.

Hence why you had been burying your feelings for Senku ever since you first discovered them back in the second year of middle school after a year of being friends with him. You sighed forlornly at the indirect rejection, throwing yourself a pity party that you almost missed Senku pulling something out from beneath the lab table.

Tuning yourself back into the conversation, you managed to catch most of what the scientist said. "I've got something for you that's logical as hell."