A possible plot is that the SI gamer gets transported into the Highschool DxD world but discovers that their gaming skills are directly related to their magical abilities. So they start training like they would in a game, grinding levels by doing quests for different factions. They could also introduce new gaming - inspired spells or techniques that no one in the DxD world has seen before, which would make them a target for some and an ally for others.
One idea could be the SI (Self - Insert) character using their gamer knowledge to unlock unique powers in the Highschool DxD universe. For example, they might figure out a way to level - up their devil or angel abilities like in a game. Another plot could involve the SI character forming a special team with the existing characters in the series to compete in some sort of supernatural gaming tournament within the DxD world. This could bring in new challenges and alliances.
The SI character could be a gamer who is actually a reincarnation of a powerful being in the Highschool DxD universe. Their gamer instincts help them recall their past life's knowledge and powers slowly. They then use this knowledge to not only become stronger but also to change the fate of some of the characters they befriend. For instance, they might prevent the death of a certain character by using their knowledge of future events from their gamer - like precognition skills.
Chapter 699, "I'm Going to Hold My Great-Grandson!", is the clearest early answer because it turns Zhao Lang's situation into a concrete plot event. The chapter turns that into something concrete by moving from Doomsday Beehive" film crew felt a surge of gratification, their...
Chapter 689, "Is the Soundproofing of This Private Room So Good?", is the clearest early answer because it turns Miss Jiang's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Jiang Li found the restaurant Shang Shaobai had mentioned, and had Ji...
Chapter 852, "Could That Be an Aphrodisiac Spell?", is the clearest early answer because it turns Rong Ya's situation into a concrete plot event. The chapter gives readers a real answer by opening on Rong Junsheng's words startled Shi Lei and Rong Kexi.
Chapter 609, "What identity would make the Crown Prince barbecue!", is the clearest early answer because the hidden truth stops feeling like mere subtext. The chapter turns that into something concrete by moving from Jiang Yan: "!!!" Right, the Cat and Mouse Game was over, they had...
Chapter 661, "Uninvited Guest", is the clearest early answer because it turns Pei Ye's situation into a concrete plot event. The chapter turns that into something concrete by moving from A moment later, Zhuola let out a cold laugh, her voice hoarse as she...
Chapter 688, "Iron Sand Palm Skill Acquired!", is the clearest early answer because the violence around Bai Lu becomes final instead of hypothetical. A useful checkpoint is the way the scene starts with Shao Changqing was very pleased with Bai Lu.
Chapter 774, "I've Found Good Guests for You", is the clearest early answer because it turns Miss Jiang's situation into a concrete plot event. It opens with Jiang Li hadn't failed to notice. and closes on Why did Shiguang go to Jiang Li's dressing room?.
Chapter 14 is the strongest chapter-level answer because it starts from Lin Manru had a rare good night's sleep. and follows through on But clearly, Lin Manru was unable to accept that her delicate daughter had....
Chapter 920, "College Entrance Exam Results Inquiry", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Outside the nursing home, Meng WanZhi anxiously waited in the car for...
Chapter 918, "Who Said She Has No Support?", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. A useful checkpoint is the way the scene starts with However, Meng Wanzhi still didn't want to hear her say anything more,...