MCSM Oneshots [Requests Open]

Her Bloodlust (*Yandere* Petra x M. Reader)

(Y/N) looked up intently at the board as the teacher wrote down a couple math equations. He quickly scribbled down a couple notes before the teacher instructed them to solve the problem. The entire class fell silent as they worked away on the math problem. (Y/N) finished the question with ease and sat still while waiting for his peers to finish.

As he waited for them to finish, (Y/N) noticed his girl best friend, (F/N) [Friend's Name], struggling a bit on the question. She had her eraser in her mouth, gently gnawing on it while thinking. (Y/N) sighed as he softly tapped her shoulder. (F/N) snapped out of her trance and looked over at (Y/N). The pencil in her mouth dropped onto the desk as she opened her mouth to speak.

"What did you need, (Y/N)?" she asked in a whisper.

(Y/N) chuckled softly, "Would you like some help? I know math isn't your strongest subject."

"Fine, but I owe you some lunch today," (F/N) responded.

(Y/N) rolled his eyes playfully as he scooted his desk closer to hers. He knew the teacher didn't mind anyone helping a fellow peer if they were done, and he'd done this multiple times for (F/N). He started to guide her through the question as she started to solve it finally.

While they did this, Petra stared at (F/N) with jealousy in her gaze. She had developed a crush on (Y/N) since meeting him in grade school. For some reason, she had always gotten jealous when (Y/N) would hang out with other girls. Her heart was set on him, and she wasn't going to let any girl get to him before she could. She knew she had to deal with (F/N) before it was too late.

After the bell rang, (Y/N) and (F/N) walked out with each other. The pair headed to their lockers with Petra not far behind them. (Y/N) placed his book in his locker before pulling out his sack lunch. (F/N) grabbed the brown sack out of his hand and threw it back into the locker.

"(F/N), what was that for?" (Y/N) asked in shock.

(F/N) giggled, "Did you forget our deal? You help me with the math problem, I buy you lunch!"

"Fine, but you really don't have to," he sighed.

She smiled, "I know, but I just want to be able to thank you!"

As (Y/N) rolled his eyes playfully at her, Petra walked up to the pair. (F/N) sighed when she saw Petra behind (Y/N). (Y/N) gave her a confused look as she motioned behind him. He looked behind him and saw the redhead smiling at him.

"Hey there Petra, did you need something?" (Y/N) asked.

Petra shook her head, "Not from you, but from (F/N)."

"What do you want?" (F/N) asked as she stepped forwards.

Petra smiled wider, "Mind if we go talk in the bathroom?"

"Why?" (F/N) asked, her eyes widening a bit.

Petra answered, "I just have a question."

"Fine," (F/N) responded before turning to face (Y/N), "I'll see you at lunch."

With that Petra and (F/N) walked off to the bathroom. Meanwhile, (Y/N) started to make his way to the lunchroom. He had a weird feeling in his gut, but decided to ignore it and keep walking.

Once Petra and (F/N) got to the bathroom, Petra shut the door and locked it. All the stalls were completely empty, leaving the two all alone in the quiet bathroom. (F/N) looked in the mirror, not knowing that Petra had locked the door behind them.

"So, what did you want to talk about?" (F/N) asked, still not looking at Petra.

Petra chuckled darkly as she pulled her butcher's knife out of her inventory. (F/N) was confused by her chuckling and went to face Petra. Right as (F/N) turned around, Petra grabbed her by the collar of her shirt and slammed her against the sinks.