How would Yixing and Jongin make their girlfriend feel better if she wasn't feeling well?
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Lay would make you food and never let you leave the bed. His soups would be warm he would have to blow on it to cool it down. When you're sleeping he would watch you silently. Lay wouldn't want you to not be able to sleep because of him.
Kai would order some food, like chicken. He would try his best to keep you warm and laying down in the bed. He would want to cuddle with you but then decide it is a bad idea.