Game of the Insane (Yandere Haikyuu!! x F!Reader Oneshots)

GREEN LIGHT (Yamaguchi Tadashi)

Requested on Tumblr.

Title: Green Light

Pairings: Yandere! Yamaguchi Tadashi x F! Reader

WARNINGS: yandere themes

Description: You've given him a green light, can you really blame him for taking it?

"That guy's always around you, you know?" Kaori whispered.

"What guy?" you looked up from your book, curious.

Kaori pointed discreetly towards the corner, "Kinda tall... lots of freckles... nervous eyes... green shirt..."

You caught sight of the man in question and smiled when he ducked his head behind the menu. He was cute, you thought absently. Definitely endearing.

"I think he's been watching you," Kaori continued, "Like... a lot."

"Really?"

"Really," Kaori seemed to be taking this fact a lot more seriously than you were, "And he's always in the library when you are and hovers around the front gate when you do."

"Maybe he's just got a crush," you reasoned.

"Maybe he's a stalker," Kaori countered.

You laughed, "He looked like he was going to faint from eye contact alone. Nah, he's harmless."

Your friend frowned but said nothing more. As the two of you made your way to the door, you saw the man's eyes peeking over the menu and you sent him a flirty wave.

His face turned bright red and he ducked his head so quickly that he nearly hit his head on the table.

The next day, in the library, you caught on to what Kaori had pointed out. The mystery boy sat in the corner, peering over a thick book at you. You were curious and feeling bold today.

"Hey," you walked over to him, "I'm (Y/n), but you probably already know that. What's your name?"

His mouth fell open and he gaped at you for a minute or two. Then, his mouth opened and closed like a goldfish, as though he couldn't decide what to say. Finally, he managed to get a single word out. "Yamaguchi."

"You want to hang out some time, Yamaguchi?" you asked.

His eyes went wide and he pointed at his chest as though to ask "me?"

You laughed, "Yes, you! Here, do you want my number?"

He bobbed his head up and down shyly. Cute, you thought.

His shaking hands handed over his phone and you added your number into it. When you gave him back his phone, he looked at it with reverence. "There," you said, "Text me sometime, okay?"

"Okay..." Yamaguchi whispered, clutching his phone like it was sacred, "Okay."

His gaze lingered on you as you walked away. You didn't see the way his fingers curled protectively around his phone. You didn't hear the small, stunned laugh he let out once you were gone. He didn't even try to go back to reading after that.

He stared at the space you had just stood in, lips parted slightly and blush high on his cheekbones.

—------------------------------------------------

Your phone dinged at 1:13 am. Who's texting me at this hour?

Bleary-eyed, you reached for your cellphone and turned it on. It was an unknown number that had texted you, but it wasn't a mystery for long.

Unknown Number: Hi, it's me, Yamaguchi. Sorry if it's late, I just couldn't sleep without telling you good night. Thank you for tonight, I'll treasure it forever.

Sleepily, you texted back: You're welcome! Sleep well!

You fell asleep immediately after returning the text.

Yamaguchi, on the other hand, didn't fall asleep that night at all.

He stared at his phone screen, unable to believe you had texted him back. An eerily large smile curled at his lips.

Your name in his phone was "Future Wife" and he had already been planning the wedding in a journal of his. You had given him your number- that meant you accepted him. You loved him just as much as he loved you!

As far as he was concerned, you'd given him a green light to continue his obsessive behaviors.

And so you awoke to a text sent an hour earlier saying: Good morning! I'm waiting at the school gate for you.

You quickly texted back: So early! You don't have to wait for me!

Yamaguchi responded almost immediately: I didn't want to miss you.

When you arrived 45 minutes later, he straightened up and said "Good morning" like he'd practiced it a million times. His smile was so bright it was flattering to think such a sight was just for you.

"You really waited here for so long?" you asked, surprised.

"I just wanted to see you," he admitted.

His smile dimmed when Kaori arrived, stage whispering "You gave him your number?"

Your whisper was harsh and so quiet he had to strain his ears to hear your response, "It's not like he's dangerous. He's sweet- he just has a crush."

—-----------

Yamaguchi disappeared into the shadows like he always did, but this time he wasn't following you home.

This time he followed Kaori.

He could tell she sensed his presence- she walked quickly and glanced over her shoulder often. When she arrived home, she turned the locks, turned on the lights, and immediately drew the blinds.

Yamaguchi stood under a flickering streetlamp, hood pulled up. He kept his breath slow and steady.

Kaori would be a problem. He could tell.

But that was okay.

Problems were meant to be solved.

And now that he had your number, your name, your trust... It was only a matter of time before he had everything.