They are only a paper tiger

Luke: "I won't run away if you want to beat me as much as you want, but please spare my life. 

I can bear the pain of your punch, but I can't stand to live alone without Elena.

Separating from Elena is much more painful than death. I'd rather die than part with Elena. 

I know that the older brothers are dissatisfied with me. I know that I am wrong, and I will do anything to atone for all of my sins.

I beg you. Let me prove that I won't hurt Elena for the second time. I won't mind if you want to dig my heart for proving that my heart only beats for Elena."

El & Marx: "..." *It was a little cliche for Luke to say those words, but they couldn't refute them.

Luke: "Big brothers, I am ready to accept all of your punishment. I will do everything for both of you. 

I will clean up your company alone without anyone's help. I will also become your servant as long as you want.