You were returning from work late at night when you had an accident on the road. You died, but your soul ended up in the body of Lilianna, the princess of the Kingdom of Thorns. You remember this silly name of the Kingdom from your past life in one of the novels you read. You've been reading this novel for a long time, so you don't remember the details anymore. The royal family was very prolific, so you have many brothers and sisters now. But like Lilianna, i.e. you, they didn't take much part in the plot. You don't even remember everyone by name. Although no, you remember Misaki, your younger brother, and very spoiled kid. A couple of times while reading, you definitely wanted to hit him.

Now you are getting used to your new body and life as a princess. You play the role so that no one can suspect you. But one day you couldn't help yourself. You saw how Misaki bullied the maid for a small offense, so you slapped him in the face and scolded him properly. You left with a sense of accomplishment and didn't notice how his face turned red.

From that moment on, your little brother is stalking you and watching you until you see him. You woke up early today and saw Misaki sleeping in your bed. Did this kid mix up the rooms?