Hyuna was finally done recording her single 'Bubble Pop'. She went to Japan for a few days that week to record the MV. She was pretty much done with that one single. She stll had yet to finish her song featuring Junhyung and Gina.   Her face was much brighter when she came back from Japan. Apparently, Joon took care of her. He really did. He might be goofy and he might look dumb, but he actually had a gentle personality. They became much closer ever since they came back from Japan. Joon also had been coming to Cube building to practice the dance with Hyuna. He was supposed to be performing with Hyuna on her comeback later.   Hyuna had a break from recording with Junhyung, so she decided to practice her dance once again. She wasn't feeling tired today, but she still wanted to practice. It was still in the afternoon anyway. She wanted to master the dance. She didn't want to upset her fans who had been waiting for her comeback.    She put on the music so loud and started dancing. She didn't stop even though it had been a couple hours. She started feeling short of breath and her head started to get dizzy.   She collapsed and everything turned dark for her.   A few minutes later, Joon came in. To his surprise, Hyuna was lying on the floor. He wanted to surprise her with his appearance in the studio, but he was surprised to see her pass out instead.   "Hyuna!" He checked on her. "Are you okay? Yah! Yah!"   She didn't answer. He checked her forehead. He