I was going to ask the same thing!!!!!!
I wanted too know too lol
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It's called "The hero proposed to me".
https://www.mangaupdates.com/series.html?id=155051
There is also a novel too.
It's a promo webtoon to, you guessed it, promote the novel. u:
if it's an actual manga, could someone tell me the name of the one at the end of the second chapter, the one with the blonde haired girl and dark headed prince?