Best Friend's Brother (Miya Osamu x Reader)

[Osamu]

When Osamu said he was taking her on a date, (Y/N) didn't think he would take her all the way to Tokyo. She thought he would just take her on one of those generic dates, a movie and food. She was wrong.

When they first arrived in Tokyo, Osamu took her to a cute cafe for breakfast. Next they walked around the city, taking in the view and taking pictures. Osamu knew how much she liked boat rides, so he bought tickets to a tour on the water. It was the prettiest thing she's ever seen.

She laughed as she saw the water splash Osamu in the face. He wiped his face and looked (Y/N) dead in the eyes. She stopped laughing before exploding into more fits of laughter as Osamu had reached out and tickled her.

"Such a cute couple." An elderly woman told her husband. He nodded in agreement.

By the end of the boat ride, it was near the end of the day. Osamu took her to a fast food restaurant knowing she wasn't about big fancy restaurant unless necessary. They ordered fries, burgers, and drinks. They ate away and talked.

During times like these, (Y/N) forgot all about Atsumu and how this was all fake.

- - -

Osamu woke up with something warm next to him. He smiled as he saw the familiar form of his best friend. Her head laid on his chest as one hand was draped over his stomach (abs). He pulled her closer before closing his eyes again and trying to fall back to sleep.

Except Atsumu barged in and told him that their mother was calling for him. Osamu sighed and untangled himself from (Y/N) before walking downstairs.

His mother was mixing pancake batter. "How was your date?"
"Good," he yawned, "can I go back upstairs?"
"Why?"
Atsumu came in and snorted, "So he can go back to cuddling."
"Oh!" Mama Miya exclaimed, "Duh! Get back to that!"

Osamu laughed before climbing the stairs. He walked back to his room to see (Y/N) now awake.

"Morning Princess." Osamu had mumbled into her hair as he sat down behind her and wrapped his arms around her.

Princess...she blushed. She held onto his arms and turned her head to see him. His grey hair was a mess and he still had his sleepy voice. "Good morning." She turned around so she could wrap her legs around him and bury her head into his neck.

"Still tired?" Osamu asked, holding her tighter. He felt her nod. "We can go back to sleep."

"And maybe not sit like that." Atsumu appeared at the door. "I was walking to my room, don't call me a stalker. Maybe close the door."
"Why shouldn't I sit like this?" (Y/N) asked, not bothering to move her head to look at the blonde.
Atsumu snickered, "You might give him a boner." With those words he shut the door and left.

Osamu and (Y/N) shrugged. They were both exhausted from their long day yesterday. The two laid back into the bed, Osamu deciding to be the big spoon. They slowly fell asleep.

- - -

When Osamu woke up, it was one in the afternoon. (Y/N) was still next to him, but just sitting on her phone. She noticed he woke up when she clicked onto Snapchat.

"Good morning."
Osamu yawned and said it back. He sat up and stretched. He looked in the mirror to see that (Y/N) was out of the clothes she fell asleep in and in new clothing. He excused himself so he could shower.

(Y/N) just chilled on his bed. She woke up at ten and his mother had came in to check on them when she saw her awake. Mama Miya made the girl get up, shower, and eat. (Y/N) now wore clothes from the older woman.

Surprisingly, Mama Miya had clothes that she could make work. Mama Miya gave her a dark beige colored skirt, and it had pockets. (Y/N) hated skirts, but the pockets made it okay. Mama Miya then gave her a white turtleneck. (Y/N) had tucked it into the skirt. She didn't look half bad. She just brushed her hair and let it air dry from the shower.

"Did you go home to shower?" Osamu asked when he walked back into his room. He wore black sweatpants and had no shirt on. His towel as draped over his shoulders.
(Y/N) shook her head, "No, your mom gave me these to borrow." She stood up and walked to the male, wrapping her arms around him and just stayed there, hugging him from behind.

Osamu smiled as he pulled a white shirt from his closet. Then he pulled a black hoodie out and pulled it over his head. When he was fully dressed, the two made it downstairs.

"There's our royal couple!" Atsumu called out, taking a bite of his meatbun. Mama Miya was going on about how (Y/N) looked lovely in the clothing she let her borrow.

Atsumu had to admit, she did look good. Osamu wrapped an arm around her and led her to the kitchen. Since (Y/N) already ate, Osamu was the one who ate most. She was snacking and keeping company.

"We're going out for dinner!" Mama Miya called out. "Boys, actually wear jeans! (Y/N), sweetie, you're coming along! I talked to your parents."

The two at the table shrugged while Atsumu was mentally banging his head against a wall.

- - -

How they ended up at a fancy restaurant, they didn't know. The twins thought they were going to some fast food place. That explained the jeans though.

Mama and Papa Miya led the way to the table. "Atsumu, sit next to your father. Osamu you can sit next to your brother and (Y/N)."

Once everyone was seated, a waiter came and gave them water as they looked at the menu. Then, another waiter came and took their orders. The group talked in hushed voices as they waited for their food to arrive.

The night was filled with laughter and fun. They ate and took a walk around the town. Atsumu was stuck being the fifth wheel.

(Y/N) walked to her house instead of staying with the Miyas again. She thanked them for the night and hospitality before walking inside her house.

"Mom? Dad?" No one. She guessed they were at work. (Y/N) changed into comfortable clothes before plopping onto the couch.

She fell asleep with the memories of the past two days on her mind.

- - -

It's been a bit since the plan started. Osamu knew well that it was working. That was a good and a bad thing. He didn't want what he had with (Y/N) to end. Atsumu was catching feelings for her and he knew it. Atsumu always got what he wanted. This time, Osamu was going to make sure he didn't.

(Y/N) laid in bed. She had the feeling after thinking about the time she spent with Osamu. She felt closer to him because of the plan. The foolproof plan to make his brother fall in love with her. In sudden thought, (Y/N) wouldn't mind if the other twin fell instead. She found that Miya Atsumu was not perfect like she had imagined or seen at school. She found that Miya Osamu was the one who made her happier.

Miya Atsumu couldn't do that, and she knew that. She knew that Osamu knew her like the back of his hand. Atsumu knew so little, and he was a flirt. Maybe that's what got her to like him at first. His outgoing, flirty personality but now, (Y/N) wasn't sure about it.

She's always liked the silent, strong types. Maybe this foolproof plan could do something else.