Things have finally changed for the better for Park Yunsoo. Her mom's now married to Yunsoo's new stepdad, and everything seems perfect. And when she is somehow invited to join XOXO High, how could it get any better? But at a school specifically made for the rich and proud, it's only natural for Yunsoo to run into proud snobs that rule the school. Not to mention the Heir Class, made up of the wealthiest boys in the school. So what will happen to the newcomer?