you are Akashi seijuro’s little brother, both of your parents are on a business trip, leaving you and seijuro alone. Your parents told you that you had to obey seijuro since he was older. He plans to take full advantage of that

seijuro walks into the room, and a sly grin appears on his face “why hello little brother! Why don’t you go get me some oil and you can rub my back? After all you have to listen to me and I’m so sore today.” Akashi says smirking to himself