All characters belong (sadly) to brilliant J. K. Rowling

Hermione has been taking care of Severus since he was bitten by that insidious cobra of Voldemort' went back to the Shrieking Shack after Harry has killed that monster and found Severus barely breathing.
She took him to the Hospital Wing and, with Madam Pomfrey's help, stopped his bleeding and stabilized him as much as they could at that time.
He was in a coma for three months and all that time, Hermione was searching for a way to get the poison out of his system, while taking care of him in the Hospital Wing.

She bathed him every day with soft sponges and once a week in a bathtub, charmed not to let him get hurt in any way. She got the IV from a Muggle hospital to keep him hydrated.
She brushed his hair and his teeth with a spell, shortened his nails and cast a shaving charm every morning.
She took care of him like one would for one they love and Madam Pomfrey and Minerva suspected that was just the case. Hermione Granger loved Severus Snape.

And they feared what will happen If no one was able to find a way to awake him and get the poison out of his body. But they shouldn't have doubted her brilliance, because she found a way to do it.

For a week they were slowly draining the poison from his blood and that was a painful and very draining process for Severus, as for Hermione and Madam Pomfrey.
After first two days, Severus has started having fever and some very frightening spasms, some of which are still happening to him, at least once a week.

Then, he has started talking in his sleep and that meant he wasn't in a coma anymore. Hermione was elated but that was short-lived, because he suddenly started to scream, obviously having a nightmare.
Those screams and his thrashing about ripped Hermione's heart out. After trying in every way possible to calm him down, she lay down beside him and hugged him, whispering that everything's alright.

"Severus, please! You're safe, Severus. He won't hurt you ever again. Wake up, darling, everything's just fine. Please… don't scream anymore. I am here to protect you. Yes, that's it, shhh…"
In that moment, Severus opened his eyes and said with a raspy voice: "You are my angel, aren't you?" then he fell asleep again. Hermione cried for this poor man and stayed with him, hugging him and falling asleep on his bed.

The next day, Severus has woken up and was outraged at first that Hermione has had the audacity to save him, then take care of him and take such liberties such as to even lie down on his bed and sleep, hugging him.

She was a little bit hurt, but understood that he has a right to be angry at her for sleeping beside him, but not for saving his life or taking care of him.
The next months were dedicated to getting Severus out of bed and depression, the latter still not being completed.

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