A "reader insert" is a literary device used in fanfiction where the reader is placed within the narrative, often as a character interacting with existing characters from the original work. In this case, the "forced lemon" aspect implies that the story involves an unconsented or coerced romantic or explicit interaction between Kirishima and the reader-insert character.

Due to the nature of this topic, I want to emphasize that any content related to non-consensual or coerced interactions can be distressing or triggering for some individuals.

As this topic appears to be related to fanfiction, it's essential to acknowledge that fanfiction can be a creative outlet for fans to engage with their favorite characters and series. However, it's crucial to prioritize consent and respect within these creative works.