The Chaos Brigade has quieted down since their stunt in Kyoto so Issei and the others must now focus on other issues. After all, there are hero shows to act in, a school festival to prepare for, and the ever-looming Rating Game with Sairaorg...

The other Bishop of the House of Gremory is released, and Akeno takes Issei to meet a new acquaintance.

Issei summons his beloved President into the heat of the battle in Kyoto. As she floats before him, Elsha whispers into his ear to poke her boobs. Pressing the switch releases his potential power and Issei challenges Cao Cao once again.

Issei and the others are back to school and their daily lives. Irina and Rossweisse both start to live at Issei's house and the sports festival is fast approaching. During all of this, Diodora Astaroth appears before Asia and proposes to her?!

Issei and Kiba fight the Xenovia and Irina, and Issei tries to deal with the consequences of their fight.

Issei and the others begin their training to improve each of their skills. All the while things are happening around them as powerful people gather to fight against the Chaos Brigade. All the young devils gather in one place.

Asia saves Issei by healing the dragon within him after his incomplete transformation. Finally, they all make it back home and enjoy their peaceful days. After Loki fails with Issei, he turns his evil grasp toward Rias.

Issei and the others continue their training, even while they fully enjoy themselves in Kyoto. Issei's group meets the mysterious nine-tailed fox once again and, this time, she begs them to help the youkai save her mother from the Chaos Brigade.

Issei and his team meet with Cao Cao at the Nijo Castle and find Kunou's mother there. A showdown between the two factions begins. Pushed into a corner, Issei finally finds it inside himself to unleash his inner potential and call for what is his.

The Gremory family is now in full training mode for the upcoming Rating Game. However, Issei has a lot of other things on his plate. There's a school festival to prepare for and a press conference to overcome. On top of that Rias is acting strange?!

Diodora continues to pester sweet Asia as the Rating Game approaches. Issei and the others prepare for battle as dark things brew in the background. When the Gremory household jumps to the field, they find themselves in an unexpected battle!

Issei goes to see Vali for help, which is in itself an action against the underworld. With the help of Arthur and his Holy Royal Sword Collbrande, the Rias household goes to the Dimensional Gap. There, they meet Rias and try to bring her back.

The Hero Faction has arrived and Cao Cao wants to cross blades with Azazel and the Red Dragon Emperor. In such a dire situation, Issei must respond quickly so all his friends make it out of this alive. Will he ever find his "potential" and release it?

The Rating Game is about to start, but Issei has things to figure out. He has formulated a guess as to why Rias is acting the way she is, but does he dare believe it? His girls give him courage. And, finally, their team steps out into the battlefield.

Issei and the others team up with the church to fight Freed, but an even greater enemy appears.

Issei learns more about the feud between the Twin Sky Dragons and Rias and Sona have to deal with troublesome family members at Open House.

Issei meets Michael, the Chief of the Angels, and continues training Gasper in the days leading up to the Leaders' Summit.

Summer break is coming up fast for Hyodo Issei, but all his plans are put on hold when he finds out he is to accompany Rias for her visit back home to the underworld! A new adventure is about to begin and all the while Koneko is not acting herself.

With Loki defeated, Rias and her household return to the human world to finish up their last days of summer. A pile of homework awaits Issei, but he goes on a date with Akeno instead! Akeno throws herself at Issei, hoping to forget her terrible past.

Alternative version of the final four episodes of High School DxD BorN.

Issei prepares for his school trip to Kyoto, but before he leaves, he must go with Rias and the others to the Gremory household so Rias can report the completion of her family. There, they meet Sairaorg, who requests a little hand-to-hand with Issei.

Issei gets another warning about the white dragon, and church followers bearing Holy Swords pay a visit to the devils.

Time stops during the Leaders' Summit, and Issei and the others meet a new enemy.

Koneko's sister Kuroka has appeared to take her sister away from Rias Gremory. Issei and Rias chase after her to stop that from happening. At the same time, a figure who objects to these alliances between mythologies appears at the great gathering.

Loki has been sealed away, but only temporarily. Rias and her family are among the volunteers trying to hold him back, while Odin returns North to retrieve the powerful hammer Mjolnir. Will everyone be able to stand up and fight against a god?