I had the idea for some Don Quixote style story where your average isekai fanboy gets summoned to another world, and it’s the job of a member of the royal guard to protect this guy. The fanboy is a delusional, socially inept, weak lech who is convinced he’s the main character of an eroge, and the knight (the actual protagonist) has to try and keep this idiot from getting himself killed (like explaining that peeping on the princess while she’s bathing would most likely result in execution, not a “meet-cute”). Hijinks ensue.