Why Is This Novel Turning Into a Circus?!

"I...Love you." "You're a black magician?" "Haven't you put the pieces together, you dumbass?" "YOU! You're the reason for my misfortunes!" "I'm sorry... I'm really sorry."

What the hell is happening?!

On the day Sienna received her inheritance, she was tragically hit by a truck and woke up inside the novel "The sun that melts the snowy mountain" in the body of Raina Atara Aillard, An important character's sister yet was never mentioned, the noblest lady but disrespected.