Plagiarism is a Crime! 
[Disclaimer:: Grammatical, Punctuations and Typographical Errors Ahead]
Kim Joongoo's Point of View 
Your passage contains a few grammatical errors. Here's a revised version:
We reached the location where we needed to remove the local crews so the major crews could continue to grow without any issues. After taking out the local crews, we started to celebrate. Of course, I did my best to convince Gun to agree, but it seems he wanted to have fun as well. This crazy bastard, hehe.
"世界に打ちのめされて 負ける意味を知った 紅蓮の華よ咲き誇れ! 運命を照らして" I sang, enjoying myself as he took the fire extinguisher he had used earlier to knocked some fatty ass bastard.
I continued singing when I remembered something.
"Samuel's getting pretty big in Seoul lately. They say he's got a tight grip on Gangnam," I told him during the song's interlude.
"I knew he could do it," Gun smugly said while holding the fire extinguisher. I was confused by his words. Wait, what?! He knows? How?! 
"Wait! You knew about him?!" I asked, gripping the mic tightly as the chorus approached.
"We should head back to Seoul soon," he said, grinning and being a kill joy again.
"Why?! I'm just starting to have some fun!" I protested. This annoying bastard was ruining the mood again.
"Did you forget why we came here?" He continued to grin. "Our mission was to take out the local crews."
"They fought well. Maybe we should make them go up against the Seoul kids next time," he suggested, and as I sang the chorus, I noticed him putting on his coat as if he were leaving.
"Oi! Where are you going?" I asked in confusion. We were enjoying ourselves, and now he was leaving. What the hell? Was he really being a killjoy?
"Back to Seoul. I have to pay Samuel a visit," he told me as he left. Well, that wouldn't stop me from enjoying this, so I decided to finish the song, "Gurenge." From the my favorite anime, Demon Slayer. After that, I took a stroll in the outskirts of the city.
                                      
                                          
                                   
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Lookism (Gun Park And Goo Kim's Moments)
FanfictionThis book will be only filled of Gun and Goo's Point of views on every chapter of lookism. If something got wrong, I'll do some plot twist. I'll be posting my povs here as well, so no one will be able to copyright the point of views that I've worke...
 
                                               
                                                  