Non-Elite Lawyer

"They said you were great?" "Because I can win the lawsuits they can't win." "Can you help me fight this lawsuit?" "What can you give me?" "Just tell me, whatever you want is fine." "Then I want her." "What?" "Your sister!" "Your sister!" "If you're not happy, then I'll go talk to the defendant." "I am the defendant!" This book does not have a time-travel system, nor is it a romance fantasy. The protagonist does not have an invincible background, but he can win the lawsuit. Are you angry?