DxD: Milking System

The next morning, Jin had a morning jog with Issei. He woke his little brother up at 5 AM, and both were running for at least 20 KM.

Unexpectedly, even after running for 20 KM, Jin didn't even feel exhausted. On the other hand, Issei had trouble breathing but still managed to finish without even stopping. Nonetheless, a feat worthy of praise for a normal human. Not too normal because he had a Sacred Gear with a freaking Dragon dwelling inside it, though.

After Issei awakened his Sacred Gear, Jin gained a trustworthy person, or in this case, a dragon, to get the information from. The dragon, Ddraig, explained happily to Jin as long as he trained Issei to get stronger.

The dragon said the reason why he wanted Issei to get stronger was to enjoy his awakening after a long time, a few hundred years. Not only that, but he also said someone called White Dragon Emperor, called Hakuryuukou, would come after him after the dragon realized his presence.

The two Dragon Emperors were fated to have a fight for eternity. And so, both would attract each other when they were close. So Issei getting stronger was important so that he wouldn't get killed by the White Dragon Emperor.

After running for 20 KM, Jin also took Issei to the park so they would be able to spar. Of course, the spar was only using bare hands so as not to injure each other. This night, they had an important thing to do: find the crazy exorcist and take Asia Argento away before joining the Devils to attack the Fallen Angels.

Kalawarner was on her way to Grigori's base to report to Azazel because the situation had changed greatly as they sparred right now.

In the spar, Issei activated his Boosted Gear and used the technique called [Boost] to double his strength. It was the technique of the Sacred Gear, doubling his strength every 10 seconds without limit until the user reaches their limit, whether it's their physical abilities or magic based on the user. However…

"Come on, Issei. Use your fucking legs and move. Do you want to be beaten like this?"

Those meant nothing if the wearer couldn't fight properly.

Jin confronted Issei, and he sent out a punch to his abdomen. Issei blocked the punch with both arms but was still pushed away due to Jin's raw strength.

"Ugh!" Issei grunted and looked up.

At that moment, Jin was already gone, circling around Issei and sending a kick to the back. The kick connected, and Issei fell to the ground hard and rolled a few times before sprawling on all four.

"Gah! That hurts, Nii-san!"

"Why are you so weak? You said you wanted to save that nun, right? That much is nothing compared to being pierced by a spear!" Jin approached Issei and pulled him up. After that, he retreated to make a distance and put on a boxing stance.

Truthfully, the only reason why Jin helped Issei was that he wanted to get that nun with healing power to his side. The girl seemed to have a good relationship with Issei, and the opposite was also true. So he would help his little brother to get that nun. That way, he would gain an ally with healing power.

He didn't want to turn her into his personal cow because of his consideration of his little brother and, more importantly, his own preference. He would save the two slots for Sona and his new target, Rias Gremory.

[Your brother is correct, partner. That was nothing compared to the fight among those in Supernatural World. You can even lose your life if you don't take this seriously.]

"Tsk! But it hurts!" Issei shouted as he looked at the gauntlet on his left hand.

"Don't whine and start again! I won't hold back, you know?" Jin rushed at Issei and sent another punch even though his little brother wasn't ready yet.

The punch connected, and Issei was blown away once again, shouting in pain.

"Aaarrgghh!!"

He hit the ground, then immediately got up and looked at Jin while holding his cheek with his hand.

"That's unfair!!"

Jin grinned as he looked at his little brother and said, "There is nothing unfair in a fight. Only unprepared and the fools. Come again. Let me show you how it works. It seems that your brain has forgotten how to fight after fooling around all this time."

"Grrr… Alright. I have promised myself to save that innocent girl. I will spare no effort!" Issei got up and raised his arms in a fighting stance. "Come! Ddraig, I will be counting on you!"

[Of course, partner!] The dragon roared, then followed by a voice. [Boost!]

"Nii-san! I hope you're ready!"

***

The sparring ended in the afternoon. Of course, Jin wiped the floor with Issei. The spiky-haired boy could only hit Jin after he Boosted himself a few times. And after hitting Jin, he fell to the ground, lifeless.

Issei's stamina was exhausted, and his body couldn't handle too many Boosts at once. The limit was four times, something that Ddraig called impressive for a human's first time. All of that was also thanks to Jin, who always nagged his little brother to exercise every week.

The sun had already set. On this Sunday dusk, Jin and Issei were standing in front of their house while wearing a set of easy-to-move clothes.

On Issei's left hand was Boosted Gear; he had already activated it so Ddraig could inform them about incoming enemies or find the stray exorcist, as the dragon unexpectedly had a good sense to feel something unnatural.

Jin had the light sword in his hoodie's pocket. He also brought a little bottle of Kalawarner's milk in case he was injured. It acted like a potion and would heal him slowly, but it was better than nothing. It at least could dull the pain of the wound until he got proper treatment in the form of fresh milk.

Their goal, for now, was to find Asia Argento and take her away from the stray Exorcist. According to Kalawarner, Raynare wanted to kill Asia Argento and take the nun's Sacred Gear using some kind of tool tonight.

Kalawarner sent the news to Jin's phone through the mail. Yes, she used a phone too. So, this night was the last chance to save the healer girl. And the perfect moment to save her was when she was only alone with the Exorcist to purge the Devil's followers.

"Now then, Issei. Are you ready?" Jin asked his brother.

"Yeah. Let's do this, Nii-san. I will save that girl, I promise that to myself."

***

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