Attack On Highschool DxD

Tatakae!

Eren and the others ran back to the base and found it destroyed. The roof was missing and half of the building was on the ground. Eren ran inside and shouted "Is anyone here!?" He look around and got no response. "Is anybody here!?" he shouted. "Eren!" someone shouted. He look and saw Armin running to him. "Armin, what happen?" he ask him.

"It was Kokabiel! He's the one who's behind this and he took our prisoners with him!" Armin told him. "Did he say anything to you guys?" he ask him. "Yeah, he's planning on destroying the whole town!" Armin said. Soon images of his parents and Issei dying from a explosion filled Eren's head. "We got to stop him!" he said. 

"We saw him heading to Kuoh Academy" Jean said as Eren said "I think Issei and his friends are still there." He took out his phone and tried calling Issei. The phone rung but on the other side, Issei and the others were actually fighting Kokabiel. "Sacred Gear!" he shouted as he activated a boost. He ran over to Kokabiel tried throwing a punch at him. Kokabiel push him away and he crashed to the ground, breaking his phone.

Issei didn't pick up, worrying Eren more. "Jeager, we've been inform that their fighting Kokabiel now" Levi told him. "Ok, let's go over there now!" Eren said. "Not all of us will be able to go. The school is being protected by a shield, only a strong attack will break through it" Erwin said. "Or, a strong titan" Eren said, looking at his hand. 

The O.R.C was tired from fighting Kokabiel. Issei was on his knee, trying to catch his breath. 'Damn it! This guy is tough, even tougher than Riser!' Issei said in his head. 

Flashback

Issei was being pushed to a wall by three boys. The boys were in middle school while Issei was still in elementary, "Little guy doesn't think he's so tough now" one of them said. Issei had called them a virgin as he walk by them while they were bragging off how they have seen girls naked. "At least I don't have to lie about seeing a naked girl before" Issei said. One of the boys punch Issei in the stomach before laughing.

Out of nowhere one of them was punch in the face. They turn and saw Eren who was fifteen during this time. "Who do you guys think you are picking on my little brother!?" he shouted at them. "C'mon guys, it's just one kid" the boys said as they were walking up to Eren. Issei ran and trip one of them, letting Eren punch one of them in the face. 

Eren then kick another in the nuts and Issei was trying his best to punch them. "These guys are crazy!" they shouted as they ran away from them. Eren chuckled and said "We make a pretty good team little bro."

Issei had tears coming down his eyes and Eren saw him crying. "Why are you crying?" he ask him. "I wasn't able to do anything. They were stronger than me but I still tried picking a fight with them" Issei said. Eren smile and he got on one knee. He put his hand on his head and said "It doesn't matter if their strong. What matters is the determination you have to fight. What's the point of fighting if you have no determination."

Eren stood up and said "If you ever feel weak, remember these words. Tatakae!"

Issei look up at him and said "Tatakae?"

"Yeah, tatakae!" Eren shouted. "Shout it with me!" Eren told him. "Tatakae?" Issei said. "Louder!" Eren told him. "Tatakae!" Issei shouted. "Yeah!" Eren shouted, as they both begin screaming tatakae on their way home.

End of Flashback

Issei look up with a face of determination and said "I won't loose!" Everyone look at him and he said "I just got to keep fighting! Tatake!" He started running at Kokabiel, screaming "Tatakae!" He punch Kokabiel in the stomach, shouting "TATAKAE!"

Kokabiel smile as he punch Issei to the ground. "Did you really think screaming your lungs out will help you?" he told him. He started laughing as Issei was beaten up on the ground. 'I'm sorry Eren, I didn't have alot of determination as you.'

Out of nowhere the shield shatter and everyone look up. Kokabiel was lifted into the air by a spike from the ground. Two green orbs came out of the woods, walking into the field. Everyone gasp when they saw what it was.

"Eren?" Issei said. "You did a good job holding out on your own Issei" Eren said. "Now just leave the rest, to your big brother."

Eren roar and Kokabiel flew into the air. "It can't be, Eren Jeager!?" Kokabiel shouted. Eren look up at Kokabiel and he jump at him. He threw his hand at him which Kokabiel dodge it. "You may be big, but you can't fly!" Kokabiel shouted at him. Eren smirked underneath the titan form as he took out his hand. A crystalized hammer appear into his hand and he slammed it on Kokabiel.

Kokabiel groan in pain as he exploded the hammer off of him. He got up but Eren stomped on him. Eren then roar as he continue stepping on him multiple times.

His foot was covered in blood, dragging Kokabiel's remains on his feet. Issei watch in horror as the man who he look up to, was acting like a monster right in front of him. Eren finally stop and he laid his foot on the remains of what used to be Kokabiel. He look at the others with a angry look.

"E-Eren?" Issei was able to say out of his mouth. "Now you see the monster he truly is" Rias told him. Eren got on his knees as the back of his neck started letting out smoke. Eren got out the nape of the neck and he look at Issei. He smile at his brother as Issei smile back. Out of nowhere a blast hit Eren, causing an explosion. "Eren!?" Issei shouted in shock.

In the air was a man in white armor.