Reminds me of this vid by a guy who did a romhack of Chrono Trigger to propose to his then-gf who was playing through it for the first time:

https://www.youtube.com/watch?v=7_HMLvLB7b0 "I proposed by hacking Chrono Trigger (Oct 24, 2008, 6m 57s)"

He writes in the description about what he was going for as far as making it seem like part of the actual game while still referencing their romantic history, and how well it worked (good for them!).

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powerclue 16 hours ago | parent | next [-]

That's me! I made that 17 years ago, still happily married. Took me like two weeks of full time tinkering. It involved a lot of trial and error messing with a hex editor.

	▲	Herodotus38 5 hours ago \| parent \| next [-]
		I remember that video! 14 years ago it inspired me, to program a text adventure game proposal for my wife (still happily married). Thanks!
	▲	proofofconcept 16 hours ago \| parent \| prev \| next [-]
		Good for you both! That is so awesome :D
	▲	brian-armstrong 15 hours ago \| parent \| prev \| next [-]
		Thank you for sharing the video way back when. I remember thinking it was very touching.
	▲	westmeal 13 hours ago \| parent \| prev [-]
		Props man, wish you guys a happy life :)

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jihadjihad 2 hours ago | parent | prev [-]

The way "romhack" was spelled made me think it meant "romance hack" for a second, which based on the video you linked seems appropriate, too.