What about Doctor Au, Diana doctor and Akko the fliter terminally ill patient? I remember reading a fanfic on this..!

Imagine the two are so close they are on first name terms and Akko loves shamelessly flirting to see how much redder can Diana get each day (and Diana secretly adores absolutely hates when she does that)

(I haven’t read the fic but I’d love to…? please leave a link if you find it :D)

thanks for the prompt!!