I'm not entirely sure as the description is rather unclear. It could potentially be about a character named Issei in the 'DxD' universe and some sort of action related to a fanfiction about him. Maybe it's about exploring or creating a fan - made story where Issei is involved in a stroking action, though without more context it's hard to be specific.
Naruto's transformation abilities like Nine - Tails Chakra Mode would also be very impactful. The increased power and the unique appearance of this mode would intimidate his enemies. In the world of DxD, where appearances and auras play a role in battles, this could be a great advantage. He could also use the chakra of the Nine - Tails to heal himself, which is something that could come in handy during long and tough battles in Issei's world.
In some fanfictions, Issei's character develops by becoming more mature. He realizes the consequences of his actions more deeply. For example, when he uses his powers, he starts to consider the collateral damage and tries to minimize it, which is a big step from his more impulsive self in the original story.
Issei could become more mature. He might be less impulsive and more strategic in his actions. For example, in battles, instead of just charging in, he would plan his attacks better.
I'm afraid it's not easy to give a clear - cut meaning. 'DxD' might be short for 'High School DxD', a series with various characters like Issei. But'stroking' in relation to 'fanfiction' is an odd combination. It could potentially mean that Issei, within the realm of fan - created stories, is having some form of interaction that is being described as'stroking', perhaps like caressing or nurturing the ideas in the fanfiction, but this is just a wild guess.
In some fanfictions, it's possible for Naruto to be Issei's father. Fanfiction often takes creative liberties and can create some really out - there family relationships. However, in the original Naruto and High School DxD (where Issei is from) canons, there's no such connection.
Smut fiction is a type of fictional writing that contains sexually explicit content. It often focuses on sexual encounters, relationships, and desires. However, it is considered a form of adult - oriented literature and may not be suitable for all audiences.