What could be the plot in the 'issei betrayed and snapped fanfiction'?

It could be his fellow team members. They might betray him out of greed for power. Maybe they thought that by getting rid of Issei, they could gain more resources or a higher position within their group.

A common plot element is the shock of betrayal. Issei is usually shown as a trusting character, so when he is betrayed, it's a huge emotional blow. Another element is his struggle to come to terms with it. He might question his own judgment and relationships. Also, often there is a part where he decides whether to seek revenge or forgiveness. For example, in some fanfictions, he initially wants revenge but then realizes that forgiveness might be a more noble path.

Perhaps in this 'natsu finally snapped fanfiction', Natsu snaps due to some dark magic influence. He has always been a fiery and passionate character, but this time the dark magic takes over his emotions. He starts to turn on his guild mates, believing they are the enemy. It could lead to a big fight within the guild, with everyone trying to figure out how to save Natsu from this dark state.

Perhaps in this fanfiction, Candace finally snapped after years of being dismissed by her parents. She decides to run away from home to prove a point. Along the way, she discovers a hidden talent or meets new friends who help her see her situation from a different perspective and gain the confidence to stand up to her family.

One common plot twist could be that Issei betrays his friends for power. Maybe he's lured by a powerful devil who offers him unimaginable strength on the condition that he turns against his comrades. Another could be a misinformation scenario where Issei is tricked into believing his friends have betrayed him first, so he retaliates.

One common plot could be Issei being betrayed by his friends in the Occult Research Club. Maybe they believe false rumors about him being a traitor to their cause. For example, an enemy might plant evidence that makes it seem like Issei is secretly working for a rival faction. Another plot could involve Issei being betrayed by a love interest. She might be forced to turn against him due to some dark magic or family pressure.

Well, it could be about Issei seeking revenge on those who wronged him in the past. Maybe someone bullied him or betrayed his trust, and now he's out for payback. He might use his unique skills or powers to get even.

One possible plot could be that Issei discovers a hidden power within himself that gradually transforms him into a dragon. This new form gives him enhanced strength and abilities, but also attracts the attention of powerful enemies who want to either control him or eliminate him. He has to learn to master his dragon form while also protecting his friends and loved ones.

Well, one possible plot could be that Naruto discovers some ancient and powerful jutsu that allows him to reach across different dimensions or realms to revive Issei. Maybe Naruto is on a mission to save the world from a new threat and he realizes that Issei has some unique power or knowledge that can help. So he uses this jutsu, brings Issei back, and then they team up to face the common enemy.

Well, the plot could involve Issei having to overcome many challenges to prove himself worthy of Sona. Maybe he has to battle powerful demons who oppose their union. He might also need to gain the approval of Sona's family or her peerage. It could also include some sweet moments of them getting to know each other better on a more personal level, like sharing their dreams and fears.