A one-time dream connecting reagent was made with the intention to meet Daniel, the prince that she has an unrequited love for, even in a dream.
However, it was her rival, Kaiden that took the reagent, and it wasn't a one-time thing?

Lizen, who has perfect grades and physical skills, is bright and strong on the outside, but hides her wounds on the inside.
Kaiden, a man who is blunt and cold, but more warm-hearted than anyone else.
Lizen is connected to Kaiden through dreams every day, and not only gets caught in a huge conspiracy surrounding the throne, but also gets confused with her emotions....

An oddly continous meetings in their dreams. Is it because it's just a dream, so it's easy to pass off as a joke, or has it become sincere feelings because of the dream.

"There's no point in 'If'. I already have feelings for you. I like you now even if I don't dream about you."