One Piece X Readers (OneShots)

Cheater!Marco X Cheated!Yandere!Reader + with a slight twist

Me: *groans*

Marco: *looks at the science project that mah gang did*

Me: No..

Marco: *snickers*

Beware! This is turning into something that is not normal...and make sure to listen to song to!

____STILLGROANING____

She has seen it all, the pictures, the messages, the late night calls and how he changed. She wanted to questioned his actions but her (E/C) eyes were blinded by his petty lies but there was something else that made her stopped questioning, 

It was how deeply in love she was to the man, known as Phoenix Marco. 

Boa came one time saying she was going to tutor Marco, (Y/N) obliviously nodded, thinking it was a small tutoring session. She could hear faints moans and grunts from above, but when (Y/N) wore (F/C) headphones, it almost like a faint whisper to her. 

Just like now, she was cuddling with Marco. He quickly fell asleep as she tried to capture his every warmth. (Y/N) heard a familiar ringtone on the coffee table, as she were about to looked at it, her eyes darted toward the little screen, a name which (Y/N) recognized so much popped out. 

It was,

'Beloved Boa'

(Y/N) felt her heart began shattering, now she finally realized. She felt feelings that she always had but this hurts too much for someone like (Y/N). Something was harshly torn from her, it was 

Her loyalty

Her trust

But most hurtful was, 

Her heart.

She knew Boa was the 'school slut' but why did she placed a blind-eye to it? She picked the phone, but end up waiting for the ringtone to die. She scrolled over the thousands pictures inside his gallery. She was right, a picture of a naked Boa from what looks like a high-angle was taken. She was smiling with full pleasure, as (Y/N) began scrolling pictures that looked almost familiar was taken. 

(Y/N) got up, and placed the phone back on the coffee table before reaching her own phone and walked out of the house, dialing someone she knew can helped her solve her problems, Luna, her older sister. 

"Eh? Why did you ask me? The answer was within you all along!" (Y/N) questioned Luna, who chuckled coldly before muttering something that sent shivers down her spine. 

"Release that inner monster within you, it loved you, more than anyone else.." before ending the call. From that moment, the usual happy go lucky (Y/N) turned 360. (Y/N) knew what to do, at last..

She dialed up the person that could help her with this scenario, it was her other sibling, he's in the military and he swore to do anything for his beloved siblings. It was Leo, her older brother. 

He quickly agree and was in front of the house the next day, first thing in the morning. Marco would be back home late, like usual. Leo's usually loving features turned into pure hatred once he heard (Y/N)'s stories, but then turned pure sadist when he heard about her plan.

Leo placed his boots in front of the house, while taking off his gears only to reveal his usual plain black shirt, with military pants. He slid in, while (Y/N) hid in the closet the was beside the door, she wasn't that mean to let Marco hurt another girl, in fact she wasn't even cruel to kill the damn guy!

She heard the door opened, then she heard something fell. The door flew open revealing a pissed off Marco with a horrified Boa. He ripped the blanket from the bed, revealing a pissed off Leo, holding a (E/C) wig. "Well well, if it isn't Phoenix Marco that dated my beloved baby sister.." he said with his usual tone but it was filled with sarcastic venom. 

Marco and Boa walked in, and (Y/N) swiftly opened the closet and leaned on the door, making sure to lock it afterwards. The duo bastards turned their heads, and for once Marco turned pale from the sight. He knew he had fucked up, he seen that face before, and what happened afterwards didn't end well. 

"Little loving Marco, what have you done?~" (Y/N) teased before kicking the bastards on her bed, luckily Leo moved away just in time. Swiftly, Leo tied the duo with a rope that he placed under the bed as tightly as he can, not leaving the duo any chances to leave. 

(Y/N) climbed on the bed, where she gently pushed Marco down, letting Boa handle the impact of having her face shoved on the bed. She leans in, as Marco was about to open his mouth, he felt something cold touched his forehead, his eyes trailed up to see a dagger's sharp tip had touched his forehead. 

"Ah~ Ah~ Ah~! Idiots shouldn't speak..you know, I known about everything that had happened~ but I let it slide, because why?" (Y/N) said as she slowly glides the dagger around her 'lover's' face, only to stopped on his left cheek while she caressed the other. 

"Because I was deeply in love with you~" Leo who was behind (Y/N) let out a dark smirk before leaving the room, making sure their actions won't be caught by uninvited guests. 

"You see, I'm being nice~ And I will release you, only with one condition" her smile turned into a frown as she muttered the last part, darkly. 

"A-and, w-what is i-it-yoi.." Marco stuttered as he looked into the (E/C) orbs, searching for mercy. 

"Leave me be, or stay with me forever and ever...and ever!!" she shouted as he pulled Marco's blonde hair, accidentally leaving a slight scar on his cheek. 

Marco froze at the spot, he never seen this even darker side to (Y/N), he knew it was his fault. He was about to give his respond until (Y/N) cuts in. 

"But, if you leave, both of you will die, but if you stay, she will die.." (Y/N) muttered as she pointed at the struggling Boa, who already had lack of oxygen. He knew the right answer, its either he stay as a prisoner or leave as a corpse. 

"I'll stay-yoi.."