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It was said that everyone had a soulmate.
A person who was perfect for you. Who completed you. Who you were destined to.
And the way to find out if someone was your soulmate was by an invisible string tied to your finger that always subtly tried to pull you towards your soulmate, should they be near. And if you were close enough to see them, the strong would become visible only to them, showing itself red and showing their bond.
Now many people were obsessed with finding their soulmate.
After all, finding your perfect partner? Who wouldn't want to try find them?
Ishigami Senku didn't.
In fact, he felt it was a waste of time to try and worry about something so trivial.
Sure, the idea of meeting your perfect partner sounded nice and all but statistics showed how the majority of everyone on earth never met their soulmate.
In fact, due to it being so rare as a kid he believed it to just be a fairy tale Byakuya and other adults had made up to entertain kids.
He only believed in it when Taiju revealed he actually met his soulmate in Yuzuriha.
He was happy for them, really, but he never felt the need to try and find his own soulmate, if this person even existed.
How would he even, when he never felt the smallest tug?
So he just went on with his life and ignored most soulmate-talk.
Then the petrification happened.
When Senku managed to break out of the stone soulmates and the like were of course the last thing on his mind.
And the topic stayed from his mind for months, until one day when walkin around he felt it.
A tug on his finger.
Suddenly everything he knew about soulmates raced through his head as his heart sped up.
But no, he must have imagined it, it just felt a random muscle spasm that he misunderstood, is what he told himself.
Except it happened more and more often, small subtle tugs, seemingly trying to pull him southwards.
Still, he ignored it, too focused on more important matters, like figuring out how to get other people out of the stone.
He only went that way together with Taiju and Yuzuriha when they needed to go to Mount Hakone to gather sulfur and make gunpowder after Tsukasa decided to enter is villain-era.
While traveling he still felt small tugs every now and then, but he never told the others.
He didn't need them fussing along with their current predicament.
The next couple of days had gone in a blur of traveling till they reached their destination.
Then when he and the others accidentally created a small explosion and were shocked to in turn see another smoke-signal being lit up.
The tugging he had been feeling on his finger for nearly a year suddenly felt more powerful, more urgent.
He however didn't have time to pay mind to it, instead too focused on trying to figure out if there really was someone else out there at all.
And then Tsukasa found them, took Yuzuriha hostage and broke Senku's neck.
He knew it was only by sheer stupid luck that part of his neck had still been petrified and that Taiju and Yuzuriha managed to figure it out and revive him.
After he had split up from his friends he frowned when felt sudden more orgent tugging at his hand.
"Okay, these muscle-spasms are getting annoying." he muttered to himself, lifting his hand to examine it when suddenly to felt like a force janked on it hard enough to make him stumble.
"Ack! What the-!?" he cried as he barely caught himself.
Then he heard a loud crash coming from the way he had been pulled to and looking up he saw a huge cloud of dust rise.
The tugging continued urgently, trying to pull him that way.
Could it be?
Senku took off running as fast as he could.
Needless to say he was shocked to find the other person who had most likely started the fires but also to find her pinned down under a huge tree.
Tug. Tug.
He paid the strange girl no mind as she called him a sorcerer of all things, too focussed on getting figuring out how to free her.
When she gave her confirmation that she was mostly fine and uninjured he grinned and got to work on making a pulley strong enough to lift the tree with just Senku's weight, ignoring the constant tugging feeling on his finger.
Finally, just as the sun started to go down he was finished and after climbing up a tree and jumping down holding his selfmade rope, the pulley did the rest and lifted the tree.
As he tied his end of the rope around another tree to keep everything stable he felt more tugging at his finger and glared at it not that he wasn't distracted anymore.
Then his eyes went wider then they ever had.
A red string.
A red string was tied to his finger, constantly tugging at him.
Turning around, faintly aware of the girl complimenting him, his eyes followed the strong, till he finally found the other end of it tied around the girl's finger.
"My name is Kohaku. And I think I'm your soulmate."