Miku and Kaito have been in a relationship for 1 week. And Miku wants to introduce Kaito to her brother. But how will Mikuo react to them in a relationship?

(Mikuo's P.O.V)

I woke up at 7 am. I sighed and finally had the strength to get out of my bed.

I proceeded downstairs to get breakfast ready. Today I have to start cleaning early because my little sister is finally coming back home. I kept smiling whenever I think of her. Even though she's my sister, I do have some feelings for her.

I finished breakfast and started cleaning the living room. "I need to do this fast in case she gets here early" I said to myself.

(Miku's P.O.V)

I started my day by jumping out of bed and texting Kaito. But instead he called first. Seeing his number on my phone makes me blush.

"Hello Miku" Kaito said

I really couldn't help but keep blushing.

"H-hey Kaito, good morning. H-h-how are you doing?" I stammered.

"Not so well" he said in a really sad voice.

"huh? Why?" I asked curiosly. It's not like him to be like this.

"Because…. You're not with me" he chuckled

"You know, you're so corny."

"hehe. I'll see you soon Miku"

"Yeah, you too."

"I love you Miku."

I blushed really hard. He always catches my breath when he does that. Well, it's not like I don't like it.

"I l-love you too Kaito"

Then I hung up, kissed the phone and went straight in the shower.

(3 hours later)

(Mikuo's P.O.V)

The doorbell rang and I jumped from the couch. She's finally here! I can finally see my little sister now.

I ran to the door and opened it to see my cute little sister. I ran to her and hugged her so hard that we fell on the lawn.

"I missed you so much Miku!"

"I missed you too big bro"

I grabbed Miku's hand and dragged her into the house.

(Miku's P.O.V)

"Wow. The house changed… a lot"

"Well it's either you're right or you're just used to being messy" Mikuo said.

I laughed. My big brother has always been my inspiration.

"Oh, by the way Mikuo, I asked someone to come here so I can introduce him to you.

(Mikuo's P.O.V)

"HIM?" I thought to myself. She's actually bringing another guy here? Nah, probably just one of her guy friends.

The doorbell rang again and Miku raced to the door. When she opened the door I saw a tall and elegant man wearing a blue scarf. He patted Miku on the head and hugged her. He had straight, dark blue hair and sky blue eyes that went perfect with Miku's long, green hair.

"Mikuo, this is Kaito, my boyfriend"

I was shocked she had a boyfriend, but I pretended as if though I wasn't. I smiled and walked to Kaito to shake his hand.

(after 3 hours of a continuous conversation about ice cream)

"Sorry, Mikuo, we gotta go if we want to catch a movie" my little sis said.

"No problem. Thanks for coming Kaito. Oh, and by the way Kaito, take care of my sister alright." I said

"Of course I will"

They waved goodbye and exited the house. Once the door closed I dropped to the floor and thought about them being together. I don't want it that way. But she is happy.

I couldn't make up my mind whether I'll tell Miku I like her or just let them be together.

I just decided to sleep on the floor.

(2 hours later)

(Miku's P.O.V)

After Kaito and I watched a movie, we went back home. But I realized I left my phone at Mikuo's house. So I walked all the way there to get my phone. When I knocked, the door wasn't locked. So I thought something bad must've happened.

I rushed inside to find Mikuo on the floor. I ran to him and shook him.

"Mikuo! Wake UP!"

Then Mikuo woke up wide-eyed. He was breathing heavily.

"Mikuo, what happened?"

He didn't say anything. He just looked at me with sad eyes and hugged me.

"M-mikuo?"