"Begin"/One shot [English Version]

A day off

Hello everyone! So this is my very first One Shot and I put a lot of effort into it. BUT English isn't my native language so there may be (a lot of) mistakes (grammar or language in general), so please be fair if I used the wrong words. Maybe you can help me improve my English skills by telling me how I could have written something. (PS: For all those who read in German as well, I am translating this story into my native language - German - soon.)
But now, please enjoy my TAEKOOK/VKOOK One Shot:

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When the members woke up it was 7 o'clock.
Everyone was up expect Jungkook, but no one seemed to be able to wake him. While the others where having breakfast, Namjoon went over to Jungkook's room. "Hey, Kookie, wake the fuck up."  You only could hear a muffling sound from the bed in which sweet little Jungkook was snuggled up to blankets. Namjoon went over to the window and opened the curtains, so that bright sunshine filled the room.
"I really hate you, Hyung.", Jungkook grumbled. He slowly opened his eyes and blinked. "Get up, dress and come down eating. Everyone's waiting for you and you know that we want to go to the theme park today." Jungkook started coughing hard. Namjoon got closer to the youngster's bed and looked at him. As he saw Jungkook's red nose and eyes, his facial expression became soft. "Don't you feel well?" As response, Jungkook slowly shook his head. Namjoon started thinking, as suddenly Taehyung ran into the room, loudly screaming: "Koookie! We're going to the theme park today! Get up, Kooookie!" He didn't recognized Jungkook being ill and jumped with real hard intensity onto him. "Get up, get up, get up!", he screamed while he started hitting him for fun softly.
"Will you get down, Tae-Hyung!", Jungkook screamed while Namjoon watched the whole situation escalating. Finally, Taehyung got down off Jungkook and stood next to his bed.  "Seriously Kookie, you're so lazy and such a morning grouch. How can't you be exited about going to the theme park?" "Jungkook is ill.", Namjoon replied. "And I think it would be the best if he stayed home today to get healthy again." Meanwhile Jungkook sat up in his bed and looked at his leader. "But I really want to join you guys.", he said pouting. "I guess, but you have to be healthy tomorrow again. You know we only got today off and you really don't look well.", Namjoon said with a worried voice. "Thanks.", Jungkook glanced at him. "C'mon, you know what I mean." "Sure, I do. But I really want to spend the day with you. Staying home alone is boring." Jungkook looked sadly at his bedding. He didn't recognize Taehyung leaving the room while talking to Namjoon. "Hyung?", he asked. Namjoon looked at him. "Yes?" "Can you please tell the others than that I'll stay in bed today?" Namjoon smiled softly. "Sure, I will. I'm proud that you're being sensible. I'll go get you some breakfast. Get well soon." He left the room and Jungkook was alone. Jungkook leaned back again and starred at the ceiling.
'This is gonna be the most boring day ever! OHMAHGAWD'

He could hear the other members moan and grumble as Namjoon told them that he was ill and couldn't leave the house. This reaction really made him smile because he knew that the others wanted him to be with them - even if they often claimed him to be annoying. He just loved these guys with his whole heart. Especially Taehyung, but he wouldn't ever show that. - at least he thought so.
He could hear somebody ran up the stairs and suddenly Hoseok came flying through his door. His brightly smile lighted up the room even more than the sun from the outside but it turned into a worried face as he looked at Jungkook. "Aww, poor Jungkookie baby is ill. I'm so, so sorry!" Jungkook started coughing again as he laughed about what Hoseok just said. "Don't be sorry, Hoseok-Hyung, it's not your fault that I'm ill." He said, trying to get the sun shining again. "I should have taken care of you yesterday at our shoot,  it war really cold and you were sweating!" "Seriously, it's not your fault. But thank you for caring about me. I'll just stay in bed for today and I won't be ill tomorrow anymore, you'll see." Hoseok went over to Jungkook's bed and hugged him. "Get better soon.", he said with a bright smile before he left the room again.
Jungkook could hear how the other members got ready to leave. Everyone came into his room to wish him recovery. But instead of cheering him up, this dragged him down even more because he realized that everyone was about to have a good day expect him.
Namjoon was the last one to say goodbye. He brought some food and something to drink. "I thought you may be hungry and to recover you need to eat something. Don't move too much and if it's getting worse, see a doctor. You can call me whenever you need to, okay?" As he left, he closed the door behind him and Jungkook was completely left alone. He looked out of the window and saw the van with the other members driving away.
He turned to the right where Namjoon left the food at a little table. He had to smile thinking about how Namjoon must have struggled cooking this breakfast without breaking anything. Or maybe some of the others did that for him? He didn't know but he tried the rice and cooked chicken and it tasted great. While eating, he didn't recognized the person running up the driveway.