Calculate

Kira was a samurai with a rather high ego and an arrogant personality. You were the son of Kira's master. No matter how much respect Kira had for his master, he never treated you well, he insulted you and made fun of you, all behind his master's back.

You fell ill today, your father had to go out and couldn't take care of you, so he left Kira in charge of you, which she obviously didn't like

"I can't believe I have to take care of you...all because of a simple fever...you're weaker than you look"

I didn't put much, in the next one maybe