One Piece Chapter 4, page 4: Chapter 4: The Great Captain Morgan

Helmeppo bursts into his father's office crying, slamming the door and shouting, "Daddy!! I want you to kill someone for me!!" Morgan looks at his son in annoyance, asking, "What's wrong, Helmeppo? Why the commotion?" Meanwhile, back at the execution ground, Luffy approaches Roronoa Zoro again. Zoro is annoyed, saying, "You again... If this is about me joining your pirate crew, my answer is still no!" Luffy cheerfully replies, "Call me Luffy! I'll untie you if you'll join my pirate crew, okay!?" Zoro sighs, grumbling, "You don't listen, boy!"