God succession system

As the match between Rias and Vali got closer, Alex noticed that Koneko and Ravel seemed to be getting more and more conscious of him. He knew that he promised to make them his when they matured and became second years, but he couldn't just say "now you match what I want, so let's f.u.c.k", and mature they had. After her growth spurt Koneko continued to mature to the point that her figure now looked like Xenovia or Irina, but her bust was now even a little bigger, something both girls would complain about occasionally since hers used to be almost nonexistent. As for Ravel, she always had a big bust but it seemed she spent the last year growing into it, and was developing a figure similar to her mother's.

What Alex didn't know was both girls were contemplating when to finalized their relationship with him as well. Their original plan was to move during Ravel's birthday in the beginning of June, but then the match up against Vali's team was revealed. After seeing that Koneko had a fire in her eyes, and she told Ravel apologetically,

"I want to test myself against big sis first, and prove my growth." After seeing the fire in her friend's eyes Ravel just sighed, and said,

"I understand, you better win for both our sakes then cat." Though her words were somewhat harsh, Ravel smiled as she said it. The two then continued to wait with anticipation until the day of the match.

***

Alex sat in the private viewing box with Rias's parents, Venelana and Zeoticus. When they all sat down at first it was somewhat awkward, since Venelana knew some of the details of the situation regarding Grayfia and Millicas. Thankfully neither asked about them, and they simply made small talk until the game started. Also sitting with him was Ravel, who said she wanted to cheer on her friend. Everyone else was sitting in the other viewing areas, meanwhile Grayfia and Millicas were watching from the dorms. As the two groups walked out onto the field, the announcer shouted out,

"WELCOME TO TODAYS MATCH! TODAY WE HAVE RIAS THE HEIRESS OF GREMORY, VS THE DESCENDANT OF THE PREVIOUS MAOU, VALI LUCIFER!"

As they were introduced the audience went crazy, as they anticipated a match between the descendant of the previous lucifer, and the sister of Sirzechs lucifer. Following Rias was her queen Akeno, her rooks Koneko and Rossweise, her Knights Kiba and Xenovia, bishops Asia and Gasper, and finally her temporary pawns Nakiri, and Millarca. On Vali's team was his queen Fenrir, his rooks were Gogmagog and Zue Bajie, his knights were Arthur and Sha Wujing, bishops were Le Fay and Kuroka, and finally his only pawn was Bikou.

After being introduced they moved onto the game selection, and a screen showed the symbol for the different games, before it finally stopped on the symbol for a standard match. After that the teams were transported to their bases, and were given time to decide their strategies. After a couple minutes Venelana turned to him and said,

"Obviously our daughter and several of her teammates are your lovers, but isn't the bishop on the other team one as well?" Alex nodded in confirmation.

"Kuroka, Koneko's older sister." Venelana nodded in understanding, recalling the incident that led to her daughter acquiring Koneko as her servant in the first place. They continued talking, until the announcement rang out that the match was starting.

Normally everyone's attention would be taken by Rias or Vali, but Alex was looking for Kuroka and Koneko, knowing that it was inevitable the two would fight. Soon the viewing screen showed two girls, one black haired and the other white haired, facing off.

***

"Nyan, here we are Shirone, facing each other." Koneko looked at her older sister, the one she thought had betrayed her for years until Alex told her otherwise.

"Big sis, I will defeat you and surpass you today!" Kuroka smiled and said,

"Can you do it? Big sis has been teaching you, but also I haven't been idle either. Nya" with her words as the trigger, the two sisters took their positions, and started the fight. Immediately Koneko rushed in while Kuroka created several barriers in between the hem and tried to gain some distance. She then started activating several types of youkai, demonic, and senjutsu magics to attack. Koneko covered herself in Touki while growing her second tail, and started smashing her way through all of the attacks.

She sped herself up and started breaking through Kuroka's barriers, before engaging her sister in close combat. Kuroka covered herself on Touki as well and the two started an exchange of blows. As Koneko was more suited for close combat and her sister magic, normally it would be normal to think Koneko would have the advantage. However Kuroka was also benefiting from the fact that Alex's queen piece wasn't overwritten, and was utilizing the increase of her physical parameters as well as the magic ones. As a result Koneko was being forced back, before Kuroka teleported herself farther away and started preparing more spells to use against her.

Before Kuroka unleashed the spells she was preparing, Koneko sighed, and was suddenly covered in a huge amount of Touki, before her two tails suddenly spilt to form a third. With the extra tail her physical abilities powered up even more, and she rushed to meet her sisters attacks head on. Using her increase speed, Koneko weaved through all the attacks, and charged directly for Kuroka, who activated several barriers to stall her. Koneko broke all the barriers once more, and attacked Kuroka again. The two engaged in close combat once more, and this time Koneko started pushing Kuroka back. Seeing her little sisters growth, Kuroka smiled, and leapt back before saying,

"You truly have become strong Shirone, but big sis won't go down just like that!" A sinister looking mist suddenly surrounded Kuroka, and her hands were suddenly tipped in green points. Koneko instantly summoned her kasha wheel to purify the poisoned air around her, as Kuroka rushed in once more. Koneko had the advantage in physical strength, but thanks to the job system Alex gave her, Kuroka had abilities she never would. As far as she was concerned, Koneko already beat her, but there was the match to think of, so Kuroka had to go all out against her.

"Don't think badly of me Shirone." Kuroka said as she slashed with her claws, effectively poisoning Koneko. Once the poison entered her blood Koneko started slowing down, her vision started blurring, and everything started to fade. She tried to purify the poison in her body, but was being overwhelmed by both it, and the poison in the air working against her at once. Kuroka used the chance to land several Touki infused attacks, and the light of retirement started to shine on Koneko.

"Rias Gremory rook retired."

The arbitrator announced, stunning the entire audience. As Kuroka watched the spot where her little sister vanished, she muttered to herself,

"If it wasn't for Alex, big sis would've lost. I'll admit, you already passed me up Shirone." Before she turned back to the fight.

***

Alex watched the match, as complicated feelings swirled within him. Both girls were powerful in their own rights, but he agreed with Kuroka even if he didn't know she said it, the reason Kuroka won was due to the evil piece he gave her. After thinking about it for a few moments, he pushed the thoughts from his head, and turned his attention back to the rest of the game.

Though the two sisters had split from the rest for their private battle, everyone else was relatively close to the same area. Rias's team was slowly being pushed back, against the overwhelming strength of the Vali team. Eventually Rias was forced into a corner, and due to the advice of her team, willingly surrendered the match.

"THE WINNER OF THE MATCH IS THE VANISHING DRAGON, VALI LUCIFER!"