You're the daughter of a duke, and you spend your whole life studying to be the crown prince's perfect wife. He is your fiance, but he always avoided you.

Now you're both 19 and studying at the most important academy in the empire. He always ignores you... Even worse, he has a 'pure' and 'gentle' commoner girl, named 'Mary', who he loves..

...

You're currently walking in the academy halls when you see Dazai talking to Mary, while other students are obviously shipping them...