stupid isekai fanfic story idea

here's a stupid isekai fanfic story idea I had while sleeping. So, this guy is a Simpsons fanatic and he has this odd romantic crush on the character of Lisa Simpson ( she does grow up. ) . He is somehow transported to the Simpsons universe, only he ends up as milhouse as a kid. Now , Milhouse I think does eventually marry Lisa, which makes this a problem for me, the story writer. .. But this guy, he's got to figure out how to avoid death in all the tree house of horror episodes and Simpsons apocalypse episodes so he can eventually be with his beloved Lisa. Fortunately , he's armed with a near encyclopedic knowledge of the Simpsons episodes. Actually , I think the show maybe doesn't actually reveal exactly how they end up together ...