It has been a week since the news and transfer of Kallen Kaslana and Yae Sakura. The two had adapted themselves quite well in the modern society despite being sealed for 500 years. Now, normally, Kiana would be happy to have a member of her family to be with her but she can't help but feel a bit annoyed. Not even when Mei-senpai spoiled her erased her annoyance. 

Why did you ask? Her good friend, Rex Crozzo was being hogged and monopolized by her ancestor and her lover, like right now. 

Kiana stared at a resigned Rex being forced to wear a dark brown coat with the crozzo family symbol on the back and a brassard on the right shoulder with the Kaslana symbol. Not only that, Rex himself found his hair tied into a mullet, reminding her of her old man with one glaring difference. 

Siegfried was her father and Rex was her friend. And the fact that Rex himself is a confirmed psychopath. No, she is not saying that because she was jealous. 

"Subject Rex looks better like this," Bronya added as she looked at her older brother figure with a nod.

"Of course he does," Kallen said with a smile while she dug into a suitcase containing replications of the equipment Reinhardt once wore. "Here," Kallen said with a smile as she handed him a pistol similar to the judgment of Shamash but had a blue crystal on. 

"What's this?" Rex asked while holding the gun, it was a revolver that fit his hand well enough and was for ambidextrous usage. 

"The Vow of Sin," Kallen said fondly as she remembered the days she spent training with her friend. "The divine key passed down to each generation of Crozzo Executors." She said while watching him spin it on his hand. 

"Hmph!" Kiana grumbled as she crossed her hand. Ever since her ancestor came back, she barely spent time with Rex. Granted it gave her more time to spend with her beloved Mei, but it was Rex. 

"Kiana-chan, that's not nice." Mei said with a small smile as she looked at her friend. Like Kiana, she was a bit jealous that the two monopolized Rex and almost had her place in the kitchen replaced by Sakura who wanted to teach Rex, Reinhardt's favorite recipes.

The two of them perked up at the revelation of the Crozzo divine key. 

"The vow of sin has been used by the partner of every Kaslana who used the Judgement of Shamash," Kallen explained gaining their attention. "Each Crozzo by the side of a Kaslana is able to use it to prevent them from being burnt alive by the power of Shamash." The young woman said as she smiled fondly at the gun on his hand. 

"It was originally a triple-barreled revolver according to Rein but was split into three with one offered to the patriarch of the family and the last two to the current wielder. It is said that when used at full power it is capable of sealing Shamash itself while in full power." 

Looking at it, the young man could not help but instinctively spin it around his finger expertly and holster it on his new waist holster. 

"Feels good." The young man said as he saw checked it. 

"that spin..." Kallen said with a smile as she looked at him, an image of an older man, wearing the same clothes as him with a shield strapped to his left arm overlapped with him. 

"Rex!" The small Apocalypse said with a smile as she looked at her nephew/son. Seeing her with Sakura, Kallen smiled and drooled at the sight of the food. Sighing, the young man helped approached them and helped set the food down. 

"We're here." 

"Oh, Class rep! Welcome back!" Kiana called out with a smile before pausing at the sight of a tanned man with Asian features dressed in casual clothes with a dark green jacket, his hood has a fur lining it and a pair of glasses on his face. 

"Oh, I'm back." Fu Hua said with a smile as she dragged the man easily as she walked. "I brought a guest." 

"Oh? the more the merrier." Theresa said with a smile before looking at the man Fu Hua dragged in, curiously. 

"Come, on. Don't be shy." Fu Hua said with a smile as she let go of her companion 

"DO you have to drag me here?" The man asked in a lethargic tone.

"Of course, If I didn't you'd be distracted by anything you see." 

"Good point." Fu Hua's companion said with a smile as he looked at Theresa and appeared in front of her. 

"W-what?" The young apocalypse uttered out as she was surprised at the speed of the male. Seeing her, The man smiled and looked at Kallen and Kiana before looking at Rex. 

"I see. So that's what it is." The male said with a smile only to get his ear yanked off by Fu Hua. 

"I apologize for him, Principal. He hasn't interacted with other people for a while." Fu Hua said with a smile as she looked sternly at him. 

"Oh? who is this?" Himeko asked as she made herself known. 

"Oh? miss Himeko. This is Ren, Ren Cruz." Fu Hua introduced with a smile as she noticed Ren looking at Himeko with shock before it was replaced with a smile, 

"Hello, Hua here told me a lot about you. Thank you for taking care of her." Ren said with a smile

"Oh, well she is a great student. May I ask what your relationship is to her?" Himeko asked, her eyes looking at him, curious as to what he was to her student. 

"Oh, I'm her-" 

"Husband." Fu Hua cut in with a smile as she hugged him with a serene smile, the piece of information surprised everyone in the event. From Kallen who was helping Sakura and Theresa with the food, to Rex using a chopstick to feed and calm Kiana down, to the usually stoic Bronya who stared at them in shock. 

Rex, who was feeding Kiana, paused and absentmindedly put the dumpling Kiana bit into his mouth. The news shocked him to the core that he paused. 

"WHAT! Rex! That's mine!" Kiana shouted with a pout as she saw her friend eat the dumpling before blushing as she noticed that they just shared an indirect kiss. 

"Oh, shit! sorry." He said as he took another food using the chopsticks to feed her.

"Well, seems like someone is having fun," Reve said with a smile as the 21-year-old Crozzo wearing a white lab coat smiled at them. He seemed to be doing well minus the fact that he has heavy bags under his eyes, and that he was carrying several trays of food.