"Ahh, Jimin-hyung stop it! It hurts"  Jungkook spoke up.

"Kookie, it's not even in yet. It will definitely hurt if you keep moving around. Shut up and keep still"  A voice which sounded like Jimin said. 

"That's right Kookie-ah"  Another person said. It sounded like Taehyung."Just keep still okay? We'll get it in you in no time. Now, do you want us to go one by one, or both at the same time?"

...

Namjoon fell onto his and stared at the bathroom door in horror

___

Translated to Mandarin by the lovely Chaely. Thank you so much for your effort! 

Here's the link: click me!