All I thought was getting stronger as I left training on the mountain. With a single punch I knocked out Issei, and took him with me. Within a few hours, Rias noticed that Issei and I were missing, but couldn't do anything as she needed to train her family for the rating game with Riser.

"Aniki, wake up man." With a kick to his body, Issei woke up in the mountain surrounded by forest.

"Shiro, where did you take me to?" Issei was ready to punch me. Seeing Issei in anger, I punched him before he could even react. Issei was sent flying a few meters.

Shiro: Issei, I took you here to train you and myself. If you could achieve balance breaker, I will let you go, as you could protect yourself. Of course we are not training alone. With a whistle.

What appeared was the fallen angel Kalawarner. She was in the sky flying, as ripples in the air also appeared.

"Wait a minute, you are that angel that is going to attack me." Issei was shocked to see her. Kalawarner didn't reply as her memories were erased and she was controlled by Shiro. All she did was look at the Issei with no emotion. 

Shiro: Be careful of the ripples in the air. You might not know what is coming out of it.

Kalawarner attacks Issei as he tries to dodge only to be hit by a random item from the gate. The item was books and other objects. Being shot from the gate is still really fast for Issei to dodge. This continues for the whole day as I watch them being beaten black and blue. After the fight, I would make Issei train his body to death. There was no resting until he broke his limit.

Very often Kalawarner clothes will be damaged and reveal her sexy figure. Issei would get fired because of boobs. "At least Issei got stronger from thinking of boob. What a trash brother I have." I was thinking in his head. At first Issei was getting destroyed like an ant, but soon he was able to fight back against her and dodge my items. This repeated itself for weeks, and I would increase the speed of my gate and make his days hell.  

When it was nighttime and I made food for everyone with my noble phantasm. After finishing eating, they went to sleep and I trained my body.

I practise my Gate of Babylon even more since, he the noble phantasm that I depend the most and because I could use it when training my body too. 

I start to fire more Noble phantasms while training my body to open more gates. It was at this moment that I found out that the Gate of Babylon has Vasavi Shakti in the gate. I was randoming firing weapons until Vasavi Shakti was fired. I could feel a connection with it before it returned to the gate. Just to be sure, I try to pull out double-ended lance Rhongomyniad LR which Mysterious Heroine XX uses. it was also in the Gate of Babylon and I have a connection with it too. While Excailbur was not in there. This means I can use Karna NP without having to take off my armor, and I have unlimited use of it.

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The one in the gates is a little different and has a different color. The shape still looks similar. Vasavi Shakti was in its full state already and didn't require my armor. 

I no longer have Karna weakness because It was only a one shot Noble Phantasm. It was also at this moment, I know getting stronger was harder than it looks. I was so strong that I needed an even more powerful foe to get me stronger. I went to sleep after recognizing that. Changing the plot was risky, but I know the future with my Noble Phantasm already.

The training continues as Issei gets his ass kick really bad. I kept destroying Issei again and he got stronger. Dragon shots were doing no damage as Issei got rekt back to back.

Issei: Which kinda monster is my brother? His weapon would get faster and faster each time. There was no end to it.

Even DDrag was shocked at Shiro's ability and how strong he was. Without moving, he can make people tired by firing endless weapons from those weird ripples in the air. 

Issei: I knew my brother was strong, but not this strong. I can't imagine if he actually uses his full power. I think Shiro can also make even more ripples around me.  

Issei was getting stronger and stronger as days went by. The same goes for Kalawarner. She was a high class fallen angel by now, meanwhile Issei was a middle class devil with power near a High class devil. Boosting his power put him to high class devils and even higher. Soon another month passed as Issei wasn't able to use Balance Breaker, since he needed boob for that. It was at that moment I facepalm myself.

At least now, he is about ten times stronger than when he faces Riser. Somehow, he was able to learn his dress break even without help, but this time he didn't need to touch them. With his eyes he was able to break girl clothes. 

Since Issei's growth was slowing down a lot, I stopped training and let him go fight in the rating game. It was almost time for it to begin as I arrived next to my future in law. 

"Aniki, and Ri-chan. I have a present for you. Think of it as a wedding gift." I said. Two red spears were given to them. Issei was given the red spear Gae Bolg, while Rias was given a Gae Bolg Alternative. Of course I still have more Gae Bolg Alternative, as Scathach has more than one. "They will be your trump card against that fire chicken. See you guys soon." I said.

Issei out a lot of the girls with no problem with his Eyes Dress Breaker. Boob and nakes girls everywhere.

Of course Rias won the rating game with the spear as Riser didn't think that spear would stop his regenation. Even the Phoenix tears were useless and Riser was impaled in the chest, and unable to regenerate and was taken out as he let Rias attack him freely. That was his doom.

Sirzechs: That red spear, Gae Bolg. The spear that inflicts curse wounds that can only be healed through natural means. How did my sister get such a weapon? Even Issei have one too, but I can tell the one in my sister's hand is stronger. The most important piece is their design is different from the one in legend. It was indeed a legendary weapon. 

The other people watching the game were curious to how she obtained such a weapon too. 

During the training, I caught the attention of the Khoas Brigade. They thought I didn't see them when I was busy training Issei, but I saw them. It was the Vali Team.