Ep 12. Clash of the Twin Sky Dragons!

Maou Lucifer and the seven devil clans begin their systematic attack on Heaven, causing chaos to break out among the angelic ranks. As the battle rages on, Issei and his friends find themselves caught in the middle of the conflict. Meanwhile, the twin sky dragons, Ddraig and Albion, continue their furious battle above the battlefield. While they are evenly matched in power, Ddraig manages to get the upper hand with a powerful blow, causing Albion to plummet towards the ground.

As Issei and his friends regroup, they encounter Valerie Tepes, a member of the Chaos Brigade who has come to assist them in the fight against the devils. With Valerie's help, they manage to turn the tide of battle and force the devils to retreat. However, the victory is short-lived as they soon realize that the Chaos Brigade is using magic to manipulate events in their favor.

In the midst of the chaos, a mysterious figure appears before Issei - a woman who claims to be his fiancee. Confused and unsure of what to do, Issei is forced to confront his feelings and make a decision about his future. Meanwhile, Vali Lucifer, the wielder of the White Dragon Emperor's Sacred Gear, arrives on the scene, determined to settle the score with his rival, Issei.

As the battle continues to rage on, Issei must confront his own weaknesses and find the strength to overcome them. With the fate of Heaven and Earth hanging in the balance, the Clash of the Twin Sky Dragons is about to reach its explosive conclusion.