There could also be a plotline centered around helping a third party. For instance, a small island is being oppressed by a cruel pirate group. Luffy and Marco meet as they both independently decide to help the islanders. They then combine their forces to drive out the bad pirates and in the process, form a strong bond and mutual respect for each other.
A possible plotline could be a battle scenario. Maybe there's a powerful enemy threatening both Luffy's crew and Marco's group. So they meet on the battlefield and have to quickly figure out how to work together. Their different fighting styles, Luffy's Gum - Gum powers and Marco's phoenix - related abilities, make for an exciting combination in combat.
Another plotline could involve a treasure hunt. They cross paths while both are on the search for a legendary treasure. At first, they might be a bit guarded around each other, but as they realize they have different clues that could help both of them, they decide to team up. Along the way, they face various obstacles like traps and rival treasure hunters.
Chapter 393, "Clearly Marked Prices, No Deception to Young or Old", is the clearest early answer because it turns Shen Ruobing's situation into a concrete plot event. Early on, Shang Zhenhe's business prospered, discord began to form between him....
Chapter 352, "Furong Cake", is the clearest early answer because it turns Lin Manru's situation into a concrete plot event. Early on, Finding Liu Suqing's address was not an easy task.. By the end, It was filled with various flowers and plants, fragrant and....
Chapter 853, "The Bracelet Worn by the Empress?!", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. It opens with Jiang Li carefully examined the branches and leaves for a while. and closes on After all, it's just an object;
Chapter 857, "Interested in joining us?", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Jiang Li looked at his face, which was black-purple, black-purple,...
Chapter 716, "Cook a Special Meal", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event. Early on, The following week was much quieter, and Jiang Li finally had some.... By the end, Shao Changqing had also mentioned this issue before, saying that....
Chapter 416, "Such a Sensitive Nose, Born in the Year of the Dog?", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event. The chapter gives readers a real answer by opening on Yu Li's words successfully choked Lady Nina.
Chapter 467, "Your Boars Have All Run Back!", is the clearest early answer because it turns Shang Shuyue's situation into a concrete plot event. A useful checkpoint is the way the scene starts with He had recently been meditating on how to accomplish the tasks...
Chapter 428, "Stunning Debut!", is the clearest early answer because it turns Stunning Debut's situation into a concrete plot event. The chapter turns that into something concrete by moving from I'm going to perform a cover of the song 'The Ocean'..." Jiang Shixu...
Chapter 480, "I'm the Guest, Give Me 500 Points", is the clearest early answer because it turns Shang Shuyue's situation into a concrete plot event. The chapter gives readers a real answer by opening on Team H delivered the seafood feast as promised.
Chapter 478, "Someone Comes to Bully Me?", is the clearest early answer because it turns Cheng Biao's situation into a concrete plot event.