Drama The Heirs Is this drama a copy of Flower Boy and Gossip Girl?

It's a bit of Gossip Girl, just the men and women have been switched. Even the actors look like, Yoo Rachel's sweet disguise looks like blair, Yoo rachel's mom is in the clothing industry and blair's mom is a clothing designer. Choi Young Do's appearance was chosen to look like chuck, badass. The main character Kim Sigh is back from the US, and Gossip Girl Season 1 serena left New York to go to boarding school elsewhere, and came back feeling the same way. serena has a younger brother, and Kim Sigh has an older brother. But yoo rachel's mom remarried, it was intercepted serena's mom chuck's dad remarried, in heirs, it was yoo rachel and choi young do who became siblings, in gossip girl, it was serena and chuck who became siblings. Cha eun sang and yoon chan rong feel a lot like dan and vanessa. yoon chan rong's dad, who is the secretary of the empire group, feels like the plot will develop later on to be a bit related to yoo rachel's mom, just like serena's mom is related to dan's dad.