One Piece Episode 528

In Mermaid Cove, Sanji together with the beautiful mermaids are playing in a pool. The chef is so happy and wishes that he can live there, and the mermaids also enjoy his company. Meanwhile, Luffy is sad because he wants to swim in the pool but he can't. Keimi has a suggestion, Luffy can wear a bubble in his head to swim. Usopp wonders why  Sanji is acting weird, but Chopper is happy that Sanji is now normal. Sanji's blood type is S RH-, and it's out of stock because it is a rare kind of blood type.  Back to Luffy, he tells Keimi that he wants to see someone on the island. Keimi thought it's the Mermaid Princess, but it's Jinbe. Luffy can't forget how Jinbe helped him carry on with the death of his brother, Ace. Usopp remembers Jinbe as the ex-Shichibukai. Luffy recalls when Jinbe told him that he will wait for him at Fishman Island. However, Keimi tells Luffy that Jinbe is no longer living there. After abandoning his status, Jinbe and the Fishman Pirates had no choice but to leave the island as well. Luffy is broken hearted upon hearing the sad news. Keimi explains further that after the war there are many changes that happened in the island.

The Medaka Mermaid Quintuplets rush toward Luffy with a warning. There's a rare kingdom ship coming in the shores of the island. Keimi immediately told the crew to hide for this ship might be coming for them. The crew went behind rocks, but Sanji was left in the water with Ishilly hugging his head to her bosom. Keimi identifies the ship as the Royal Gondola. It is a large oarfish with a carriage on it. One of the mermaids still can't believe that there's a royalty from Ryugu Palace boarding the ship. The sound of the trumpets echoed through the island, signalling the arrival of the Princes of Ryugu Kingdom, akatsukiaboshi, Ryuboshi, and Manboshi. The Neptune Brothers greet the mermaids who are already giggling and shrieking. Luffy, hiding behind the rocks, wonders why the princes are here. akatsukiaboshi tells the mermaids that they got a report of unauthorized entry. He wants to confirm if illegal entrants are the ones they are looking for. But the mermaids told them that no one has come in the island.

Someone is watching them from a far, Hammond. He is also wondering why the Princes are there. akatsukiaboshi bids farewell to the mermaids and thanks them for their time. However, Sanji is now on the verge of losing his self, his head is still clenched against Ishilly's chest. He can't take it anymore and explodes with a heavy nosebleed! The spurt of the blood reached a very high level, with a shape of a sexy mermaid. Chopper was so shocked and runs to help him. There are lots of blood in the water and in the face of Sanji. Luffy becomes worried because Sanji lost many blood. akatsukiaboshi is now checking the poster of wanted crews and was surprised to finally confirm that Monkey D. Luffy is just a few steps away from him. The Prince orders his Ammo Knights to arrest them. 

Chopper apologizes to the guards for entering illegally and begs them to delay their arrest because of Sanji's condition. Chopper asks them to help Sanji and donate blood to him. Luffy joins Chopper in begging to the mermaids and mermen. Usopp also begs and tells them that they can't let Sanji die. Keimi explains to Chopper that humans and mermen can share the same blood, but before she can continue Hammond interrupted her. He tells the crew that there's no way someone will donate blood to them because they will get a "judgment in the dark." Hammond also tells them about the old law forbidding fishmen and humans share blood. He gives emphasize to the ironic fact that this rule was implemented by humans, because of the belief that fishmen are monsters.

Hammond commands them to leave Sanji in the island and go with them to the Fishman District because their boss wants to see them. Usopp doesn't care about the stupid rule and still asks the people if they have an S RH- blood. Suddenly, Hammond throws a Trawl Net at them but Luffy sweeps it away. Luffy uses his Gomu Gomu no Jet Pistol at them and knocks them out. Usopp screams at Luffy telling him to look behind him because there's a monster! Luffy uses his Haoushoku Haki to intimidate the monster and it did not fight anymore. akatsukiaboshi while watching is impressed with the fight. Keimi comes back with the Royal Gondola, she hijacked the ship to bring the crew to the town and get the right blood type for Sanji. The crew boarded the ship, leaving the princes behind at Mermaid Cove.The mermaids apologized to akatsukiaboshi for not telling the truth about the pirates. They explained that the pirates are good people and friends of Keimi's. However, Ryuboshi explains to them that they are looking for the crew because they will deliver a message coming from Jinbe.