''Syrup Village Arc'' episode 10 (part 2)

Episode 10(part 2) as Luffy went to see Usopp and cheer him up by saying that :'' no matter what anyone says, Yasopp is a great pirate.'' and they discussed if Usopp is ever going back to that house again, in the same moment they saw that caretaker Kurahadol coming with the weirdo that fell asleep from his own technique. They were talking about some kind of an operation, that Jango named it ''Ojousama assassination operetion''. It is the butler's perfectly planned out strategy by having pirates attack the village and make it as if Kaya died in an accident as well as hypnotizing her before killing her to write a will saying she'll leave her whole inheritence to her caretaker Kurahadol.
Turns out that the kind caretaker is actually a pirate named Captain Kuro. He quit being a pirate, made one of his subordinates as a scapegoat to socially execute Captain Kuro, became a caretaker and been acting as a trustworthy person, all to gain wealth and not get chased by the government.
As Usopp was shaking all over for overhearing such a dangerous conversation, as usual even though he heard everything Luffy understood nothing saying: ''what's going on? is it turning dangerous?'', while Usopp explained everything all over again he pictured the worst case scenario of the village being attacked and Kaya getting killed he became more and more conscious to the seriousness of the situation. In that moment Luffy stood up blowing their cover saying to the evil two :'' you down there, don't attack the ojousama!!'', as expected from Luffy so straightforwardly honest in a stupid way, being so direct as if they would listen.
By doing that, Kuro spotted Usopp and understood that he heard everything, as a measure for getting rid of any witnesses Jango moved on to the hypnotism, and you can guess who took the spell. By falling asleep standing Luffy fell forward down the cliff and landed on his head. Even though Usopp escaped from Jango's hands Kuro declared that no matter what he does he will not affect his plan, by telling him the exact time of the attack. Usopp ran with all his might crying that he wants no one from his beloved village to get killed.