It's 400Bc while the jeon dynasty is widely spread in the whole korea. Now the most wait time of the year has came. The time when boys goes to serve in for the king. The had to train for 5 months and then after passing the test the serve with other shoulders while girls can't as the rule

( present time) Your mom : you can't , try to understand you are a girl You : but I want to ( you are arguing with your mom to participate in the competition as you love to fight from your childhood days)