For most of the day, Thor seemed off, he didn't act like his usual self. Steve thought that perhaps his boyfriend was probably upset about something. He planned to ask him about it after his mission with Natasha and Clint. As soon as the three of them came back, Steve went straight to his and Thor's room.

"Thor? Are you in here, dear?" Steve asked entering.

"Mhm." Thor quietly replied.

He was laying on the bed on top of the covers, in a t-shirt and sweatpants, with a deep frown on his face.

"You've been off all day, is everything okay? Is something bothering you?" Steve asked, kicking off his shoes and sitting on the bed.

"Well, I can assure you that nothing lays heavy on my heart or my mind. I just feel this strong weariness that makes my limbs heavy and my head ache." Thor answered.

"Hmm, you're probably just sleep deprived. You have been traveling through realms fighting battle after battle without proper rest for about a week. We should probably turn in early so you can get some rest." Steve said while stripping off his uniform.

Once he was down to his underwear, he pulls the covers out from under Thor and covers both of them. Thor agreed that some sleep would do him some good and quickly fell asleep with his arm draped across Steve's hip. In the morning, Steve woke up to an empty spot on the bed where the thunder god should be. He also heard a deep, heavy coughing coming from the bathroom.

"Thor?" Steve said knocking on the bathroom door.

"Do not enter!" Thor said urgently, his voice rough and hoarse.

"Why? What's wrong?" Steve asked concerned.

"It seems that it was not lack of sleep that made me weary yesterday. Unfortunately, during my traveling between realms, I have contracted the Asgardian Spotted Illness, also known as Ratatosk Bites. It's...similar to your...chicken pox." Thor replied through the door.

"So, you're sick? I didn't know you could get sick." Steve said.

"No, not with Midgard illnesses, I can't. But this is of my world. Although, it's rare and mostly contracted by children. But I never got it in my youth, so I thought it would always evade me. Clearly, I was wrong, which is bad because the illness if fiercer if caught as an adult." Thor explained.

"Then come to bed and let me take care of you." Steve said trying to open the bathroom door, but it was locked.

"No! I do not know if my illness is contagious to this realm. I could very well cause an epidemic that could possibly kill you mortals. It's best if I isolate myself until the illness passes, so please leave!" Thor protested in between horrible coughs.

"But...dear, you sound awful. Nobody should be alone when they're sick. You'll get better faster if you have someone taking care of you. Please let me help you." Steve pleaded.

A few minutes later, Thor sighs then opens the bathroom door. Now that Steve could see him, he looked terrible. He was pale, sweaty, and fever flushed, and he had dark reddish-brown marks that resemble bites all over his arms and face. And when Steve lifted Thor's shirt, he saw more marks on his chest, back, and abdomen.

"Are these things everywhere?" Steve asked.

"Yes, and they burn like fire." Thor nodded.

"Come on, lets get you into bed. So far, with the symptoms and everything, this sounds almost exactly like chicken pox." Steve said as he lead his sick boyfriend to the bed.

After tucking Thor into bed, Steve lays the back of his hand to his forehead.

"That's some fever you got there." Steve said frowning worriedly.

"Don't fret, my love, this illness will pass." Thor said holding Steve's hand.

Then he lets out a few harsh coughs that leaves him breathless. Steve sits him up and rubs his back through the fit.

"I'll go get you some water." Steve said kissing Thor's head.

He grabs a cold bottle of water from the mini fridge and gives it to Thor. Then he goes into the bathroom and wets a washcloth. When Steve places the rag on Thor's forehead, the Asgardian sighs closing his eyes.

"That feels nice, thank you, Steven." Thor said.

"Do you want to sleep? Or do you want to watch some TV?" Steve asked sitting in his spot on the bed.

"I would like to watch the television please." Thor answered, snuggling into Steve's side.

"Okay, what do you want to watch?" Steve asked wrapping an arm around his boyfriend and grabbing the remote.

"The tales of the ducks." Thor replied coughing some.

Steve smiles fondly as he hands Thor a tissue. He found it very endearing that Thor loved cartoons, his favorite being Duck Tales. After watching about eight or nine episodes, Thor falls asleep. Turning off the TV, Steve checks on Thor's temperature. He was warmer than he was before, making Steve a bit more worried.

"Oh gosh, what am I gonna do if I can't get his fever to go down?" Steve mumbled to himself.

Now that he was really thinking about it, Steve had absolutely no idea how to take care of a sick Asgardian. He's only ever seen the god injured, not sick. Silently, Steve made a promise to himself to get Bruce if it became too much for him to handle. And soon...he'll have to fulfill that promise.