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English
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Published:
2026-04-09
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1,113
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1/1
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78
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Hypnosis

Summary:

Senku gets hypnotised and follows his instincts... which lead to you.

Notes:

I'm currently watching The Mentalist and there was a scene with this situation. And I lowkey wanted to write a self-indulgent fic about it so here we are <3

(See the end of the work for more notes.)

Work Text:

“Nahhh! Hypnosis doesn’t exist.” Senkuu detested with an almost bored tone, his little finger scratching his ear.

“No, I promise you Senkuu-chan, I’ve done it multiple times” the mentalist beamed. “And even if you don’t believe me, I’m sure there were actual studies done about this topic. I’m surprised you haven’t heard about them.

“I was never really interested in psychology to be honest. Is this even considered psychology? Or is this… magic?” the boy gestured magical hand movements with the mere purpose of annoying Gen. You had to hide your smile behind your hands.

After a long harsh winter, it was a relief to see spring finally arrive. Days were longer now and the temperature finally rose. And with it, so did people’s spirits. So when a surprisingly warm evening came and someone came up with the amazing idea of celebrating with a bonfire, not many protested.

It wasn’t a big party. Some food, booze, friends, a fire, playful banter. Just like in the old times. Because when someone is too occupied with rebuilding civilization, sometimes the fact that they are still just a teen can easily slip one’s mind. So it was nice to be reminded.

“I don’t know about you guys but I’d love to see some proof of it.” interrupted the ever so practical Kohaku. “You said you’re a pro, didn’t you Gen? Well I volunteer. Hypnotise me!”

“Are you sure about this? I mean it’s been a hot minute since I last practised… 3700 years to be exact…” the boy laughed awkwardly. “I wouldn’t want to mess it up or something… plus you’re the strongest one among us. What if you run away and I can’t un-hypnotise you?”

Kohaku couldn’t argue with that.

“It’s okay, Gen. We won’t force you to prove it to us. It’s your choice when and where you choose to hypnotise someone.” you stated gently.

“Thank you!”

“But of course it’ll absolutely make you seem like a liar. Gosh, I wish there was an easy solution!” you quickly added with such puppy dog eyes, that it immediately ruined the mentalist’s mood.

“That’s what I’m saying! The guy’s a total phony.” the scientist laughed.

“You guys are so mean to me sometimes!” the guy whined, earning a chuckle from the others. “Fine! I’ll do it! I’ll hypnotise someone. But not Kohaku-chan! For all of our safety.”

The girl tried to act offended but she was also laughing as she gently there a small branch at Gen. To which he replied with an appropriate amount of dramaticism.

“See?! She’s already attacked me! Imagine if she was hypnotised to have no boundaries!”

“Oh shut up! But the question remains. Who should get hypnotised, if not me?”

“I’m just throwing this idea on the table, but what about the guy who’s the most sceptical?” your sly grin was met with Senkuu’s frown.

“That’s not a bad idea actually! The least complicated way to hypnotise someone is to just get them in a trance where their instincts and deepest desires come to the surface. And Senkuu-chan is always so collected and civilised. I’m kinda curious what he would be with no boundaries…”

Oh no! Now it was the two of you against him!

“Hold up! Let’s not jump to conclusions! I never agreed to this!”

“What? Are you scared? Gen is a nice guy, he won’t hurt you.” Kohaku cooed with a shit-eating grin.

“Senkuu! Could you really sleep at night if you haven’t found out whether Gen’s lying? I thought you were a man of science, thirsty for all knowledge!” you teased him dramatically.

In the end you had all turned against him. What a bitter betrayal! I guess he had no choice left.

“Fine!” he rolled his eyes. “But if I do anything embarrassing you’re not allowed to tell anyone!”

“Oh he’s playing the boss card!” Gen laughed. That stupid grin of his didn’t comfort Senkuu at all.

He stayed sitting on the tree trunk next to the fire as Gen stood in front of him and took his hand. He leaned in, whispering calming nothings while keeping his fingers on the artery in his wrist. Kohaku and you stood up and walked closer to get a better look at the process.

Gen kept mumbling stuff like “Relax! Breathe! What do you want to do the most? Imagine yourself doing it!” while gently pressing a spot on Senkuu’s arm before stepping back with his signature grin.

“Do it Senkuu-chan!”

He opened his eyes, scanning around. He looked a bit scary like this, in your opinion. His signature grin and other micro-expressions that made him him, were nowhere to be seen, only a neutral face, wide eyes and a dilated pupil.

“Well Senkuu? How are you feeling?” Kohaku asked cautiously.

His head snapped in her direction, eyes examining her face. Then his gaze slowly moved over to you as you carefully took a few steps back. With a few swift steps he towered in front of you catching you off guard. Eyes widened, you stumbled, losing your balance. But the fall never came.

Instead you could feel his steady arms around your waist, pulling you flush against him. Thanks to the blood rushing to your cheeks your skin warmed up under his touch, lips already opening but he didn’t give you time to protest, before his lips crashed into yours.

Huh?

All the air escaped your lungs and your stupid stomach started fluttering but what could you do? THE Ishigami Senkuu was kissing you!

Thankfully your body caught up faster than your mind and you slowly melted into his touch. Your hand found its way to the back of his head where you started playing with his hair and only at this point did you realise how well his lips fit against yours.

Although it felt longer, the kiss itself lasted for only a few seconds before you finally separated. You knew your face was burning and you were incredibly overwhelmed by this whole situation but Senkuu would not let you go. His arm stayed steadily around your waist.

“That’s enough buddy.” Gen’s firm grasp on his shoulder finally motivated him to let you go.

He slouched back on the trunk, his gaze still stuck to you. The mentalist pressed the same spot on his arm while whispering something in his ear and just in a second he returned to his old self. He looked around confused.

“So? Did it work? What did I-...Why is Y/N red?”

Silence.

“Don’t.”

Kohaku was already opening her mouth but your glare and finger pointing at her shut her up.

“You guys made out!” Gen blurted out.

“WHAT?!”

“SHUT UP!”

Notes:

hi sleep-deprived cloud here from the next morning. i just wanted to tell you that i wrote this in one sitting at 3am without proofreading anything. like i didn't re-read any part of this. wtf

i hope you enjoyed tho!!!