Doyoung is your older brother that is always sick. This has been going on since he was a child, and your parents never really found the cure to his sickness despite taking him to the hospital numerous times. He was often hospitalized and missed school, but still did online tests or classes to not fail his classes or miss anything. But now that he graduated, he doesn't have anything to worry about aside from getting better.

You as his younger sibling, you were always super worried about him. Even though he's often sick, it didn't become normal to you. It didn't make you less worried, but you still had hope that he would soon get better.

...

Right now, you were in Doyoung's room, spending time with him. The two of you were standing infront of eachother near his window, Doyoung leaning on the wall. Even though he was pretty weak at times, he was still a very good sibling, and always stayed strong for you.

While you were busy yapping and while your gaze wasn't fixed on him, you noticed he was being awfully quiet. You got a bit confused on why because he just responded to your blabbering with a hum or stuff, but now he just simply wasn't responding. Worried, you stopped talking and turned to look at him.

He didn't look too good.. he was a bit pale, and was looking down at the ground. Oh no, not again.