How a 21 year old joined the revolution army akame ga kill

David was devastated from the death of his own brother in car incident Alex's he confronted the suspect that killed his brother David showed no mercy for the killer and kills him with a gun he soon realize if he had murdered him he would go to prison so he shot himself in the head later on David open his eyes and find him in front of god he ask if he wanted to see his brother again he said yes for David's second life if he wishes to find his brother he will have to join the revolutionary army and to help them against the empire.