In the first season of Bridgerton, Anthony and Siena have a passionate but doomed romance. The couple faces numerous obstacles that keep them apart throughout the series. Anthony's concerns about fulfilling his father's legacy and his high standards for his sister Daphne contribute to his reluctance to pursue a relationship with Siena. Additionally, their differing social standings play a significant role in their separation.

From Anthony's perspective, his position as the Viscount Bridgerton requires him to marry well and find an ideal wife. He does not consider Siena suitable for this role due to her profession as an opera singer and what he perceives as questionable morals.

Despite Siena's genuine affection for Anthony, she cannot wait for him to make up his mind about their relationship conflict. When she seemingly turns her attention to the Duke of Hastings, Anthony becomes jealous and tries to reignite their romance.

In an important scene in the third episode titled "The Art of the Swoon," Anthony makes his case for a relationship with Siena. However, she recognizes that he is caught in a repetitive cycle and will always prioritize his title over everything else.

Throughout the series, Anthony oscillates between playing societal roles and returning to Siena out of loneliness or jealousy. The use of color in this scene highlights the contrasting personalities of the characters, with Siena wearing red to represent her passion and Anthony donning black to symbolize his bleak perspective.

Despite Siena's firm stance, she finds it difficult to stay away from Anthony. They engage in intimate moments in episodes 4 and the season finale. However, Siena eventually realizes that she must move on and let go of Anthony. In a tearful goodbye, Anthony apologizes for his behavior and behaves like a gentleman.

As Bridgerton season 1 concludes, the final image of a bee foreshadows the next chapter in Anthony's journey, as hinted at in Julie Quinn's book series on which the show is based.

In summary, Anthony and Siena's relationship in Bridgerton season 1 is hindered by Anthony's concerns about his father's legacy, societal expectations, and their differing social standings. Despite their passionate connection, the couple ultimately realizes that they must part ways, leading to a tearful goodbye.