You were born in a very rich family, but your parents never care about you since your birth, They only care about your older bro, ethan. Your and him are the opposite

You have a server is name Adeline, and your bodyguard is dazai. Since childhood, they have always been there for you. You often see Dazai training and you're interested to try, so you beg Dazai to teach you. finally Dazai agreed to teach you "But we have to keep this a secret, if your parents find out they will be angry"