One Piece Season 9 Episode 552 A Surprising Confession! The Truth Behind the Assassination of Otohime!

In the season 9 episode 552 of the anime One Piece, titled "A Surprising Confession! The Truth Behind the Assassination of Otohime!", the story progresses with the Fishman Island arc. It is revealed that the former queen of the Fishman Island, Queen Otohime was assassinated in her palace. The episode starts with Luffy and his crew exploring the magnificent Fishman Island.

They are greeted by the royal family of Fishman Island who informs them about the current situation of the island. Luffy and his team get to know that King Neptune is in pain and tension as his beloved wife, Queen Otohime, was killed a few years back by someone believed to be a human. The king has been trying to figure out the cause behind her assassination since then. He has also issued an order to capture the killer and bring him to justice.

The current situation raises concern among the Fishmen inhabitants as Otohime was not just their queen but also the mother of the current mermaid princess Shirahoshi and the hero of the Fishman Island, Tiger Fisher. While the royal family tries to deal with the situation, Luffy and his team continue with their exploration and come across a local food contest in the Fishman Island.

Meanwhile, Shirahoshi has a confession to make to the Strawhat Pirates - she was responsible for the death of her mother, Queen Otohime. The revelation leaves her shattered as she never had the courage to confess it to her father, King Neptune.

The Strawhat Pirates are left stunned by the revelation, and Luffy takes it upon himself to confront King Neptune and Shirahoshi and help them deal with the situation. With the help of his friends, Luffy tries to convince Shirahoshi that her mother would have been proud of her and her sacrifices.

As the episode progresses, Luffy comes to know about a secret operation that the king has been planning. The king has hired Fukaboshi's pirate allies, the Macro Pirates of the New World, to carry out a special mission to retrieve a mysterious treasure on the sea floor. Luffy, being Luffy, wants in on the action and convinces the king to let him and his crew join the mission.

The episode reaches its climax as the Strawhat Pirates and the others embark on the mission to retrieve the treasure. But, to their shock, they find themselves surrounded by a group of mysterious pirates who seem to have been lying in wait for them.

Overall, One Piece season 9 episode 552 is a gripping episode that moves the story forward while also revealing some important plot points. The episode is filled with suspense, action, and some emotional moments that make it a must-watch for anime fans.