It was either a manhwa or webtoon where this man had dreams of 4-5 individuals but was only able to see their silhouettes. He has narcolepsy which makes it hard for him to be a part of society so he writes books. He has a best friend who works at a nearby restaurant. I also remember he got a new neighbor who cooked for him since it’s difficult to control his attacks and cook without being in danger.
Looking for a slice of life where guy fails college exam and cafe owner picks him up off the streets with his cat to work at his cafe which had cats that were neglected. He can’t be separated from his cat or else he gets sick and he can see cats in human form too!