Rex Crozzo, dressed in a lab coat hummed a soft tune as his feet traveled through the halls of the Crozzo family's private estate, a simple two-story house in the suburbs and similar to a traditional Japanese house. 

The sound of vomits and hurls made the youngest Crozzo pause from his walk and lowered the cup pressed on his lips.

Near him, a small pot's plant rose, revealing Rin looking at him. 

"You hear that?" Rin asked, squeaking a bit. 

"Yeah," A long sip and the pink and grey foxes looked at each other...

Rin hopped out of the vase as Rex caught her and with silent footsteps, crossed the distance and stopped at the place where the vomit and hurling noises were. In front of them, Reve and Arle nodded at them as Rex held the sliding door. 

"What are you four doing?" 

"SHH!"

The four turned to see a smiling Kallen dressed in cute clothes. Sakura stood with her, dressed in cute, casual clothes. 

"Oh?" Kallen's eyes and smiles fell as they heard the hurling noise. It was still early in the morning. 'Strange, these three only act like this when it comes to...' She then analyzed the situation and smiled as she grabbed the sliding door. "Rein~ Want to go on a—," 

Reinhardt knelt by Elysia's side, rubbing her back while holding her hair as she vomited on the toilet bowl. 

Silence echoed throughout the estate as Rin fell to her knees. "God... is... real... and he loves us..." Tears fell on the unofficial Crozzo's face as Reve hugged Arle, who blankly held back. 

Rex saw this and turned to Kallen with a smug smile that eerily reminded Kallen of her distant relative, Kiana. 

"Rex... don't eat the pies..." Elysia whispered, giving Rex a pained smile only for her to hurl and vomit on the toilet bowl. 

"AH! BIG SIS!" Rex moved, followed by Reve. The two idiots panicked and ripped off the locations of the medical cabinet drawers and panickedly looked at the medicines while Rin ran to get some water. 

Arle smiled as she saw the sight and chuckled as she saw Reve panic and debate with Rex about which medicine should they give Elysia. 

"Big sis, don't die..." Rex wept as he held Elysia's hand. "We'll offer Rein to you," 

"I agree! I have the paperwork!" Reve showed her a marriage certificate. 

"I have a friend who knows a priest," 

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Rex hummed as he walked around St. Freya Academy while holding a tablet. 

Noticing a classroom where his great [A lot of time] grandmother stayed as an undercover student, Rex entered the room. 

"Okay, everyone, settle down," Rex called out as he entered the room, his glasses making him look more mature. "Since there is an emergency, I'm filling out for my brother today." Turning to the students, Rex blinked as he saw some familiar faces. "I'm Dr. Rex Crozzo, a scientist of Schicksal and a junior Knight of House Crozzo," 

With a snap of his fingers, several floating hands formed around him, each one holding a chalk and writing on the board. "We'll be focusing on BASIC theory for now. Any questions?" 

"YEAH!" Kiana said, raising her hand with a grin. "What's with your hair?" 

"That's a result of using too much Honkai radiation. While I can safely use it, too much can have side effects." Rex explained as he looked at her. 

Hearing this, Hua's stare caught his attention. 'Stupid brat, I told you to be careful. You just wanted to show off.'

"Dr?" 

"Not a medical doctor really, but more of a scientist," 

After class, Rex looked at his tablets as the students exited the room only for Kiana to smile and grin at him. 

"So? a sensei?" Kiana asked with a grin. 

"Subbing for my bro. He took big sis to the doctor," Rex replied and lowered his tablet. "Oh, speaking of which, sis wants me to invite you two and Bronya to dinner at the estate," 

"REALLY?" 

"Yeah, she was quite adamant about it too," Rex replied. "I hope you like Salmon," 

-0-0-0-0-

Reve blinked as he used his sword to poke the two knocked-out gremlins in front of him. Yanqing and Yunli. 

"They should get married already," 

"They're 12,"

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