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.
Issei could react with anger. He might lash out at his partner and the person they cheated with. He could also become very confrontational, demanding explanations and apologies.
It depends on different perspectives. From a purist point of view, it's likely to be seen as inappropriate because it may distort the original intention of the source material. But for those who view fanfiction as a space for unrestricted creativity, it could be seen as an interesting exploration. However, it should be noted that if the work is shared publicly, it may receive a lot of criticism due to the sensitive nature of the topic.
I haven't actually read a specific fanfiction with this plot. However, if such a fanfiction exists, it would likely involve a lot of creativity in terms of how the relationship between Issei and Serafall developed to that point. It could explore different aspects of their personalities and how they would handle the situation of a pregnancy, which might be quite different from the original storylines of their respective characters.
Well, it could be about a story where there is a kiss involved in a revenge plot within the context of an Issei - related fanfiction. Maybe Issei has been wronged in some way and the kiss is part of a devious plan to get back at someone.
It could be any fan who is interested in creating a story around Issei's downfall. There are many amateur writers in the fanfiction community who might come up with such a concept.
It could be about a character named Issei facing a situation where he is overpowered or defeated in some way. Maybe in a battle or a competition within the fictional world of the fanfiction.
Issei for sure. And there might be a rival character who has wronged Issei in some way, which prompts the need for revenge. There could also be a mysterious character who helps Issei in his revenge plot, and perhaps this character has some sort of connection to the kiss aspect. It could be that they teach Issei how to use a kiss as a form of revenge or they use their own kiss - related powers to assist him.
Well, in such a fanfiction, one can expect a lot of interesting plot twists. Issei getting Riser's peerage would likely change the power dynamics in the High School DxD universe. It could lead to new alliances and rivalries. Maybe Issei would have to deal with the loyalty issues of Riser's former servants. Also, there might be a whole new set of training and growth arcs for Issei as he tries to master and utilize the new members of his peerage.