A/N: Pinned Butterfly used to be a collab fic between me and Teabags. I talked to her about me revamping this concept into a new fic since I got inspiration to work on it again. I have most of what I wrote on my blog which I will rewrite with my current writing style. Her parts I will have to rewrite from what I remember but it won't be exactly the same. I remember the trail we were going for with this fic. I won't spoil it since there wouldn't be any fun doing that in the first chapter.

This idea started when I talked to Teabags over Nowaki's obsession going overboard and stalking Hiroki after his rejection. Since Teabags is amazing at angst style fics, I told her the idea and she loved it. This was more of a practice to test my limits in writing a dark fic with my most favorite couple.

This time, I will be doing this on my own so expect a different fic if you read this one before.

Thank you for reading and tell me what you think.

-Lucicelo

Chapter 1

"Please, tutor me, Kamijou-san."

Hiroki stood flabbergasted at his new acquaintance's declaration. His fierce blue eyes peering down at his own with determination clear on his face. Wanting him as his tutor for his schooling. He almost answered, no, but stopped himself when he saw his genuine smile. Nowaki Kusama seemed sincere in learning everything he offered through his own knowledge. His university must had sparked an interest. Although, Nowaki had no idea on the work ethic he held under his belt.

He might run Nowaki off after one session. Flashbacks of old students brought out his annoyance. Plenty of his old students complained to their parents on his overzealous studying habits. Those teens assumed he would do all their work for them without complaint. Shoving their work in his hands and slacking off with a game or reading manga. Hiroki explained to their parents why he quit on them. Satisfaction filled him when they lectured their child over wasting his time. Forcing the kid to apologize before he left them.

Not that he needed the money from these sessions. His parents provided enough every month for him to live on. After paying his costs for the month, he worried about nothing. He had enough money for train tickets and groceries. He just worried over the deadlines for his assignments.

This made him selective on who he agreed on bringing into his study circle. Few people managed to keep up with him. His meter of patience went down after they missed vital study sessions. He deleted them off his phone and continued on his own path. His own studies took priority over everybody else.

They never called him back with an excuse. Ungrateful.

Hiroki arched brow in speculation, he inquired. "Why?"

Nowaki listed off anything from the top of his head. "I never had a chance of graduating from high school due to my circumstances. There are no excuses but I want to get back on completing my education. Despite my part time jobs, I will make time to study with you. Please, give me a chance. I promise I won't fail you."

The desire in seeing the man in front of him again fueled Nowaki's insistence. He knew after this encounter, he wouldn't see Hiroki again. This new person that brightened his day. Despite the party he organized for his friend, a long week of work dampened his spirits. His smile, faked throughout the day. He didn't want his friends to ask questions and sour the good mood.

Hiroki Kamijou brought out new emotions inside of his chest. A flame he thought went out through the hardships in his life. The butterflies fluttering in his stomach and his heart sped up. Emotions his co-workers described whenever they garnered feelings for someone new. The sensations he secretly yearned for whenever he watched couples out on the town.

He watched Hiroki contemplate in agreeing with this new deal. Hiroki showed his thinking process through his face. From the hesitation until he settled on resignation. It showed in his body language as well. Nowaki bit the inside of his cheek. He couldn't think of victory until Hiroki said it out loud.

Pushing back his bangs from his eyes, Hiroki responded. "Fine. I'll tutor you. Just know that it's what we're doing together. Nothing else. Got that?" He hoped he made the right choice.

Nowaki fiercely nodded his head. "Yes." He took out a mini notepad from his pocket, asking with the biggest grin. "I'm going to need your phone number." Hiroki furrowed his eyebrows. "I left my phone back home, I'll call you in the afternoon."

Throughout the first week of tutoring, Nowaki sneaked peeks at his new tutor. His short brown locks, warm brown eyes, gorgeous face, and nimble body. His concentration wandered whenever Hiroki explained a new section on his booklet. The husky voice made him lick and bite his lower lip. He wanted nothing more than to hear Hiroki talk to him over and over again. At times, he watched Hiroki nibbling on his pens. A spark went through him when his eyes lingered on him. His infatuation leaked through these private moments but he hid it well. Hiroki realized nothing amiss as he read through more textbooks.

He forced himself to stop staring at Hiroki to work on his assignments. After all, Hiroki expected the best out of him. His long lecture on the first day stuck in his mind. He explained how any misstep on his part meant he wouldn't teach him anymore. Hiroki had his own studies to focus on. No use wasting time on someone fickle who abandoned him when it got rough. Hiroki repeated this constantly on the first week.

Nowaki appreciated Hiroki's dedication on teaching him. The booklets and mock tests he prepared with care. Effort in booking time in between his part time jobs. He saw him reading through old textbooks from high school in order to gather more information to help him. At the same time, Hiroki's own text books laid open in front of him. Through these lessons, Hiroki kept on top of his school work with ease.

Showing failure wasn't an option.

Nowaki found the material easier than expected. This surprised him when he studied the booklets during his lunch breaks. After years out of school, he assumed headaches of confusion. Pulling at his hair and running himself ragged trying to understand the pages. The initial anxiety went down when he went through his homework in a flash. He toned it down in Hiroki's presence. He asked the man to tutor him in the first place.

Hiroki's tutoring skills resonated well with Nowaki. Strict in his ways but taught him easier note taking. Shortcuts to harder areas which helped him remember better. Hiroki took meticulous time explaining the steps in descriptive detail. Leaving no room for him to remain confused.

He used scrap paper to write down his problems before transferring them into the booklets. Neat and tidy. His handwriting went downhill after leaving middle school. After hearing it from fellow co-workers, this turned into an insecurity. Hiroki couldn't gaze at his usual chicken scratch. He wanted to impress him through his success and think of him as a future lover.

As he sat in Hiroki's apartment, he memories every detail. Remembering the rules Hiroki set for him whenever he walked inside with his messenger bag. He made sure not to mess up anything when he sat on one spot. Entering in other rooms was out of the question. Hiroki explained that his room remained a mess. Odd. Considering, his living room contained an over abundance of books which almost toppled due to the amount. Nowaki wondered if Hiroki hid something he couldn't find out. He pushed it out of his mind when Hiroki tapped his hand to gain his attention.

From the size of the apartment, it was bigger than his own place. A perfect size for Hiroki and his collection of books. His own was small for his height. He went to a communal bathroom down the block. A tiny kitchen which suited his needs. Cheap enough that he didn't starve himself after giving his payments to his landlord. In a way, he was embarrassed in showing Hiroki his apartment.

He insisted in going to Hiroki's apartment every single time they scheduled a study session.

Hiroki didn't mind. In fact, he insisted. He had all his materials in his home. From the amount of books he placed on the desk, carrying all those to Nowaki's apartment might turn into a burden.

Nowaki sighed in bliss. He couldn't had chosen a better tutor. It felt like destiny that he met Hiroki in the park that day.

Hiroki scowled as he pinched Nowaki's side. "Wake up, brat. You have to read this text and explain it to me."

Nowaki smiled, nodding in eagerness. "Of course, anything you want."

Nowaki whooped when he read the score on his first mock test. "Thank you so much! I didn't think I would get a perfect score on this one!" He placed the paper down on the desk and contained himself from pulling Hiroki into a tight hug.

Hiroki waved it off as he graded another one of Nowaki's tests. "You made the effort to get that score. This is good news in my opinion. I expected a harsher time in getting you to understand the problems. It seems science and math are your strong suits." He checked Nowaki's English test and narrowed his eyes. "Your score in English is impeccable. Are you sure you don't know any English?"

Nowaki shook his head. "Maybe I have a knack at picking up languages?" Nowaki leaned over the desk and read the test. "Although, I have had jobs where I worked in a tourist filled area. The boss made me learn English phrases throughout my employment to make my job easier. I have to say, those tourists know how to keep a conversation going. I taught them Japanese while at the same time they taught me English."

Hiroki pushed Nowaki back to his own side, demanding. "Alright then, tell me a phrase in English. I don't care what it is, just tell me something."

"Why?"

"Just to prove that you speak it. You have used it often right?" Hiroki drawled as he checked off another correct answer. "Well? Go on. I don't have all day. Unless, you are trying to show off or some shit."

"Thank you so much for tutoring me. You are an amazing man and I hope to make you proud one day." Nowaki told him.

Hiroki scoffed. "I understood none of that."

"You didn't?" Nowaki's eyes widened in shock, he thought the amazing person in front of him knew the language. " I thought that you..."

Hiroki twirled his pen around and snapped. "Don't look at me like that. I know some words but even then my pronunciation is horrible." He nibbled on his pen when he checked the English booklet. "My grades in English were low which surprised the rest of my teachers in high school. My friend helped me through the main tests so I can read it well but everything else is shit."

"Oh..." Nowaki collected every single one of his tests in a pile. "You don't mind if I take these home with me right?"

Hiroki shrugged his shoulders. "If you want, you need all the information to absorb. You can't stop studying the old ones just because I taught you something new. It's up to you if you want to take them with you. It's better to review everything than to find it in the test and get it wrong."

Nowaki placed his tests inside of a folder and an idea popped into his mind. "I will keep on studying. Um..do you want me to make something to eat? Just something small for a well deserved break."

"Make sure to clean everything when you're finished."

"Alright." Nowaki stood up. "Do you have any suggestions?"

Hiroki answered. "Whatever you can make from my stuff in the fridge. I don't have much."

Chuckling, Nowaki walked toward the kitchen. "Then, I will get a light meal."

Hiroki noticed Nowaki came into their study session in a foul mood.

Nowaki walked inside, subdued, gave him a sub par greeting. Hiroki watched him as Nowaki set his bag right beside his usual spot and went to work. His booklets placed in the right alignment while he started writing. When Hiroki placed a water bottle right in front of Nowaki, he didn't stop to take it. In fact, he continued on reading his booklet and writing in his notebook. Ignoring his gesture and keeping the marring frown on his face.

Hiroki was used to Nowaki's talkative nonsense that this newer quiet man turned almost disturbing. When he asked him questions, Nowaki answered in a soulless voice. He gave no follow up questions and went back to staring down at the table.

He coughed into his hand when he asked. "Nowaki, are you alright?" No answer. This ticked Hiroki off as his eyebrows furrowed.

Frowning, Hiroki wrote down another 100% score for Nowaki's homework. A small packet which contained everything Nowaki needed to know in his exam. His student sat across from him. He raised his gaze, noticing Nowaki stared right at him. It was obvious his mind was somewhere else. He stopped writing anything in his notebooks. Giving him the most intense stare Hiroki experienced. Almost ready to snap at him, he handed the corrected papers to Nowaki. Placing his attention on checking more of the material before they resumed.

With no brightness in Nowaki's eyes, he collected the sheets and stared down at them. On the last packet he received, Nowaki burst with happiness. He praised Hiroki as an excellent tutor and pulled him into a hug. Invading the older man's space and tightened his grip. He had no such reaction on that day.

Hiroki repeated his question. "Nowaki, answer me when I am talking to you."

Nowaki met his gaze, giving him a placating smile when he responded. "I'm alright. Just a little tired from my earlier job that's all."

Hiroki noticed the lack of energy from Nowaki's voice alone. He knew well of all those part time jobs. Nowaki wrote down every single schedule from those jobs. Planning these study sessions in the right time so Nowaki had time to rest. Never having worked in his whole life, the amount boggled Hiroki's mind. Nowaki always seemed upbeat and energetic whenever he came to see him.

This change unnerved him.

He assumed something else happened with Nowaki. "I don't believe you." He placed his pen down on the table. "

Nowaki's body went rigid. His face stayed composed as he shoved his hand inside of his pocket. Gripping a small object he discreetly took from Hiroki's apartment. Minuscule that Hiroki wouldn't question the location when it went missing. Their tutoring sessions almost came to the end. His exams in the horizon, bringing his overall mood down. He was positive he wouldn't see Hiroki again.

Hiroki stated. "Listen here, if you don't want to be here, just tell me. You might be concentrating but your mind is somewhere else."

"N-No, I'm fine." Nowaki insisted. "I can stay here."

RING RING.

Hiroki grumbled as he stood up. His annoyance clear on his face on the interruption. He went to the door in a flash, leaving Nowaki alone in the living room.

The young man grew curious about the visitor when Hiroki didn't come back fast. He got up and walked toward the hallway leading to the front door. His eyes widened when he saw an unfamiliar face shuffling Hiroki's hair to the side. Hiroki sported the warmest smile as he slapped the guy on the shoulder. Nowaki felt a heaviness in the bottom of his stomach.

Hiroki arched a brow. "You shouldn't have come here Akihiko. I would had come to your place in person."

Akihiko leaned against the door with a smirk. "You took your sweet time. Did you oversleep again looking after my work?"

Hiroki chuckled. "I have other things to do than to babysit your story. In fact, you should consider yourself lucky." He grabbed the manila envelope from the shoe cabinet. "I managed to finish it on time. Be grateful."

Nowaki gulped. He gripped the side of the wall when the guy placed another hand on Hiroki. Shuffling closer, he made sure he was still out of view. Straining his ear in an attempt to catch their conversation.

"I always am." Akihiko noticed a different pair of shoes. "Ah, you actually have someone visiting you? I didn't know you had any other friends."

"He's just a guy I'm tutoring." Hiroki explained.

"I thought you stopped the whole tutoring thing. The last kid from high school made you quit. You don't even go to study sessions with people in your own classes."

Hiroki rolled his eyes. "That brat from high school was a moron. This one is actually learning something."

Nowaki felt a sharp pain digging into his chest. He didn't know Hiroki thought of him as simply a student. The desire in a different relationship seemed one-sided. Determination filled him as he went quietly went back to his seat. Writing more of his notes to fill in the empty spaces. He wrote in complete silence.

Hiroki returned back to his seat and sat down.

Nowaki asked him. "Who was that?"

Hiroki regarded in high esteem. "A friend of mine."

Nowaki gripped his pen tight. Turning his eyes to his booklet on the table. Disappointment etched on his face. Although he was safe from questioning, Hiroki's attention went to someone else. He tried not to assume Hiroki's relationship with the man at the door was something deeper. After all, Hiroki called him a friend. Nothing more and nothing less. He still had a chance to win him over.

Blissfully ignorant, Hiroki wrote down more questions for Nowaki to answer. His attitude lifted after seeing a familiar face. He failed on realizing something crucial which changed his future.

His involvement in the middle of an obsession.

TBC