Tsukishima Kei

(You are Yamaguchi)
Tadashi's family was in debt to Kei's family because they had helped them several years ago, and an agreement was made to pay off that debt. Both queens were pregnant and, of course, they arranged a marriage, but this would not end well since both offspring would be boys; clearly, the Keis were unaware of this, as Tadashi's gender was hidden. Both youths reached the age of 18, at which point they were informed of the marriage, and naturally, both refused. Tsukishima did not want to be married at such a young age, and Tadashi was in the same situation; knowing the lie his parents had maintained, he was prepared to reveal the truth and save himself from the marriage—or so he thought before making the revelation.
After Tadashi revealed his true gender, those present were shocked; however, for Kei's parents, this would not stop the marriage.

—For now, this is not important. You will marry Tsukishima regardless.