A lone young man dressed in a trench coat dashed through numerous hordes of zombies. Yes, zombies. For some reason, during a visit to Nagazora to try and contact a family friend by the name of Ryouma, the city became isolated from the outside world. A pair of musket bayonets in hand, the young man became a wind and streak of death. 

Holding a machine in his hand, numerous red blinks echoed in the darkness of the moon as an Honkai beast charged. Timing it right, powerful explosions killed the Honkai beast and shattered buildings, creating a barricade to stop the zombies from approaching using that street. "Go to Japan, he said!" the young man said before flicking the blood off his blades. "It will be fun, he said," he repeated with a scowl before pulling out a revolver and shooting a zombie in the head 

Staring at the hordes, the young man sighed before his hands dug into his trench coat, taking several knives in his hands. Like a fan, the blades danced as he moved. Blades severed bodies, blows shattered bones. In less than 5 minutes, the horde was killed. "This is Rex, if you can hear me, this section is cleared." 

Static

A large explosion shook the ground and Rex blinked before turning to the direction. 

"Should I go there?" Rex thought to himself before mindlessly ripping the head off a zombie with a backhand. "Might as well... god! I stink!" Sighing to himself, Rex turned to the stress and moved. 

Worn bayonets glinted with light as a foggy area came into view and a little girl hugging a Homu Doll stood alone with a horde of-. 

Focusing his strength on his legs, the young man kicked off the ground as hard as he could and held his bayonets. 

"You okay?" Rex asked the girl, kneeling in front of her while being unbothered by a machine pointing a cannon at his face. He dropped a pair of shattered bayonets on the ground as he looked at the girl. "Wait... a minute..." Rex looked at the girl and his eyes widened before his hand took a phone out and looked at her then at the phone again. "Are you... Bronya-Onee-sama?" Rex asked, looking at her. 

Hearing her name, Bronya's eyes widened as she looked at Rex. A blood-stained man around the age of Kiana Idiotka knelt in front of her and knew her name. 

"Seele is gonna be so happy that I found you," Seele? Does he know Seele? Her mind froze as she looked at this man. Who was he? 

"Anti-entropy huh?" Noticing the machine, Rex smiled and gently patted her head. "Seele is safe, we managed to rescue her and created an artificial flesh and blood boy for her. Don't ask me how, Uncle Jack paid for the research," 

"Who are—,"

"Bronya!" 

Rex stayed quiet as he looked at them. 

"Ah!" Both Rex and a girl with white hair and blue eyes said at the same time. 

"Crozzo/Kaslana!" The two said at the same time and drew their arms. A pair of guns for the Kaslana and a pair of fresh bayonets for Rex. The air thickened as the two looked at each other and at Mei. 

"Nice tastes," Rex said with a smile. 

"Why thank you," Kiana replied with a grin before they looked at each other. 

Slap

A powerful high-five echoed as the two nodded to each other. 

"Mood-kindred!" The two shouted as they flexed at each other and somehow produced a pair of weapons. A pair of baseball bats on hand as they noddded at each other.