He would baby you so so much, tons more than he normally did. You actually wouldn't want to tell him in the first place because of how extra overprotective he'd get and would try to hide it for as long as possible. But he'd find out eventually. He always had an eye on you and would notice any small change in your behaviour. You'd be slumping around while walking, or laying down a little longer than usual, or having a loss in appetite, and he'd immediately figure it out.
"Baby, you should have just told me if you were not feeling well. Come here," and he'd hold you close, kissing your forehead. He'd make sure to have you wrapped up in blankets and would make the healthiest food possible for you.
"Now, you won't be leaving the house at any cost for the next few days, am I understood?"
When you'd gape at him in shock and say, "It's just a little cold, Jin, you can't possibly lock me up just for a little-"
"You will not be leaving the house and that's final, unless.......you want to stay locked up even after you get better?"
When you'd shake your head no with a pout, on the verge of tears, "Aigo, my baby! Don't worry, I'll be with you the entire time!" he'd coo, and hug you tight.
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Yoongi
He'd notice almost immediately. You would have been trying hard to hold in your sneezes or coughs, but somehow, just somehow, he'd hear your tiny sniffling and would walk straight up to you with a frown. "Are you feeling alright?" The way you'd shake your head no and would look anywhere but at his eyes would confirm his suspicions.
But for him, colds weren't a normal thing. As an idol he'd have been taking care of himself so well that he'd catch a cold maximum once in several months or even a year.
"Baby, how can you lie to me like that? Look at me," he'd say, grabbing your chin in his hand and forcing your eyes to meet his.
"What did you do?"
"W-what?" His question would confuse you.
"I asked, what did you do," he'd say with his voice raised a little.
"What are you talking about?"
"What did you do to fall sick?" His eyes would have darkened considerably, making it difficult for you to hold your stance.
"I did nothing. It's a virus. People catch it sometimes," you'd answer, standing up to leave, but he'd pull you back before you could even take one step, and with so much force that you'd fall right onto the couch. Giving you a glare, he'd go to get blankets and medicine. Once he made sure you were warm and settled, he'd give you one last glare before going to make you some recovery soup.
