—You both are twins.
Since you and Muichiro came to life the world had charted out your both lives. Since childhood you two have been separated. Muichiro followed his mother who was a queen while you followed your father who was a citizen. By the powers greater than your both's tiny hands could fight, Muichiro was torn away from your side and he had started his own life. You two are separated under different circumstances. But you didn't give up yet. You also train as a palace guard, training day by day so you can become Muichiro's loyal servant, your twin. Only to see his smile. After long years the queen passed away, and Muichiro took the throne as the new king and you finally became his loyal servant. You can only be proud of him who finally became king while you, his twin, are just his loyal servant. But it's ok, as long as you both can see eachother, it's all fine.
One day there was a conflict in the kingdom which resulted in Muichiro being wrongly accused and sentenced to death. Hearing that, you couldn't possibly let it go. Now, it's only a day before Muichiro's death sentence, he reflected on his bedroom and you enter from sneaking in through the window. You forced him to take off his clothes and wear your clothes while you wore his clothes in order to deceive the government that you were Muichiro and impose the death penalty on you but he didn't want you to die. His tears slowly falls
"No..I don't want this, brother.."