"Alert!!! Siren Planes incoming. I repeat Siren Planes incoming." Fubuki relayed on the radio
"Ara... let's get this started. Atago launching into battle." Atago jumped into the sea.
"Nee-san, wait. My onee is always like that. Hmmm. Takao initiating into battle!" Takao jumped to the sea and followed Atago.
"Jeanne d' arc help in the fronts to maintain firepower, Forbin and Le Triomphant help the vanguards to do torpedo run. Bearn assists in carrier operations.
Meanwhile, Yukikaze and her fleet are on their way back to Strait of Malacca after their commission. She is with Mikuma, Mogami, Ryuujou, Kongou, and Haruna.
"I pick up sirens on my radar. Ready yourselves." Haruna alerted the fleet.
"I, Yukikaze the Great, will finish them Hahaha!" Yukikaze proudly shouted.
"I hope I don't bring misfortune in battle," Mogami told herself.
"Don't worry nee-san. You are not a misfortune." Mikuma told Mogami.
"Haruna, this is an urgent situation we need to prepare. Everyone prepares for possible battle." Kongou faced Haruna and ordered everyone.
"Hai. Flight Deck clear Kongou-san." Ryuujou replied.
"Be ready! We are near. But wait, It is coming from the base. The base is under attack! Onee-san prepare your cannons we need to hit these sirens hard." Haruna surprisedly told them.
"Hai imouto-san." Kongou happily responded.
They headed straight to the source of the signal and saw a very large fleet of siren ships in front of them. Haruna and Kongou pulled out their swords and charged into battle. Suddenly, aircraft are launched and shells were fired behind them. Ryuujou looked at her back and saw Kaga and Akagi together with Choukai and Maya.
"Akagi nee-sama we are at the rear of a massive siren fleet," Kaga said worriedly.
"There are many eyesores for my Kaga. Let's clean them up." Akagi said with her sadistic smile.
"Akagi nee-sama we are in serious trouble. We are behind a massive siren fleet." Kaga seriously replied.
"My Kaga is always worried. Don't worry Akagi will protect you." Akagi replied and licked Kaga's cheeks.
"Akagi nee-sama!" Kaga replied in shock.
"Maya nee-san, don't leave Choukai behind," Choukai told Maya.
"Mind your own business Choukai. Don't come near me or I might mistake you from an enemy." Maya told Choukai as she pulls her sword.
"H-hai Maya nee-san." She replied.
"Akagi nee-sama the siren fleet has blocked our way to the base and I saw a humanoid siren in the middle of the fleet," Ryuujou reported to Akagi.
"Ryuujou san will you help us clean them up?" Akagi asked Ryuujou.
"Hai. Akagi nee-sama." Ryuujou responded.
Akagi radioed to the base that is currently under the attack of sirens. Nagato received the transmission and relayed it to all ships. Suddenly, they saw a squadron of Grumman F6F Hellcat and Grumman TBF Avenger and attacked the siren ships.
"Sister Sara is here!" Saratoga suddenly shouted at a distance. Cleveland saw Saratoga together with her sister ship Lexington, and their escorts are Hobby, Columbia, and Denver.
"Unexpected reinforcements Hahaha." Cleveland suddenly said when she saw the fleet.
"Cleveland, don't forget that we have an enemy in front of us," Enterprise told her while she was fighting sirens.
"Yes. Ms. Enterprise." She replied.
Enterprise and her fellow aircraft carriers in the base faced the sirens and provided air cover and additional firepower against the sirens while Akagi, Kaga, and Ryuujou provided air superiority to help their vanguard in pushing the sirens.
"The simulation test is above the expected scale. Azur Lane remember my name! I am Tester Beta. " The humanoid siren suddenly spoke.
The siren aimed her long sullen cannons to the port and blasted a high-speed beam of light destroying the dock and other parts of the port. Suddenly, a huge wave of siren planes darkened the sky. The mass-produced ships suddenly fired. Enterprise sighed and continued to fight them. Being alerted by the noisy blast and seeing the docks were destroyed, other Sakura Empire ships joined the fight. Submarines like I-19 and four others did a torpedo run while aircraft carriers. They fought the sirens to the last of their strengths and managed to win the fight but the damage to the port was too large to measure.
"We will meet again Azur Lane. You fought better than we expected." Tester Beta told them and took her to leave.
"Better than expected?" Enterprise told herself.
"Don't worry about that Ms. Enty. The important thing is we defeated them." Cleveland told her while she pats her shoulder.
"But the damage the siren caused is beyond repair. We failed to protect the port." Enterprise replied.
"We can't do anything about that Ms. Enterprise. It is the same as what happened to Pearl Harbor. The siren destroyed the port within unrepairable conditions. The difference is that we now knew what is the humanoid siren capable of." Cleveland replied.
"We need to prepare ourselves for the upcoming siren attacks." She replied.
Meanwhile, Nagato can't believe that the humanoid siren caused unbelievable damage to the port. Fubuki is crying to the now destroyed command center which she was holding for a couple of months being stationed to the port.
"Ara... ara... you look tired Takao? Let me energize you." Atago asked Takao as she went to her back and groped Takao.
"N-nee-san!!! Ahhh nooo, ne-nee-san." Takao shouted as Atago grope her. Sunset came and other factions spent the night in what's left in the port. Luckily, the dorms are barely damaged that they can still stay there. The next morning, other factions went home. While Enterprise and her fleet went with Kirov's fleet and Nagato's fleet to Vladivostok for the planning of the recon team in the Bearing Sea near Diomede Islands.