What are some interesting Highschool DxD dragon fanfiction stories?

One idea could be a dragon OC that has the ability to transform into different elemental forms. For example, it can be a fire - breathing dragon in combat situations, but a water - based dragon for healing or stealth purposes. This would add an interesting dynamic to the story as it could befriend different characters based on its form.

Another plot might involve the Nightmare Dragon Emperor's journey to discover his true powers. He could encounter various mentors or ancient artifacts that help him unlock hidden abilities, all while dealing with the normal high school drama and the supernatural politics in the background. It would be a mix of self - discovery and power - up story.

One interesting storyline could be the Red Dragon Emperor exploring new powers. For example, he might discover a hidden aspect of his Boosted Gear that allows him to access a different form or ability. This could lead to him having to train in new ways and face challenges that he wasn't prepared for before.

You could also write a fanfiction where the Heavenly Dragon Emperor loses his powers completely. This would make him have to rely on his wits and the help of his friends. He would start from scratch, learning how to fight and strategize all over again, and this journey of self - discovery could be a great story to tell.

One interesting crossover could be the power - up systems. In Dragon Ball Super, characters achieve new forms like Ultra Instinct. In Highschool DxD, Issei has his Boosted Gear. A fanfiction could explore what would happen if Issei somehow got access to the Saiyan power - up system or if a Saiyan character got ahold of the Boosted Gear. Maybe the Saiyan's natural battle instincts combined with the Boosted Gear's power would create an incredibly powerful being.

Another idea is a fusion of the power systems. Maybe in the fanfiction, the Sacred Gears from Highschool DxD could be enhanced by the Dragon Balls. The Dragon Balls' wishes could be used to unlock new forms or powers in the Sacred Gears. This would create a whole new level of power - ups for the characters in Highschool DxD.

Well, a plot could involve the Vanishing Dragon's power being misused by an evil force. The protagonist then has to go on a journey to reclaim and purify that power. This could involve teaming up with some of the characters from the original series, like Issei and his friends. They would have to overcome various challenges and battles, all while learning more about the true nature of the Vanishing Dragon.

One idea could be a dragon hybrid character who is trying to hide their true nature in the high school setting of Highschool DxD. They constantly have to struggle with the urges and powers that come with being a dragon hybrid while also dealing with the typical high school drama.

One interesting story could be about Kalawarner's growth in power. In some fanfictions, she discovers new abilities and uses them to protect her friends in the dangerous world of Highschool DxD. For example, she might develop a new form of magic that no one has seen before.

Since the 'adult fanfiction' part is inappropriate, focusing on the 'High School DxD' proper, one interesting aspect is the unique power system. The Boosted Gear is a really cool concept. It not only gives Issei power but also has its own personality in a way. And the battles between different devil factions based on this power system are quite engaging.