
Writing letters back and forth is equivalent to exchanging text messages now. So they basically saw each other in person a couple times, exchanged messages, confessed, and are now to be married. In my opinion, that’s fast. Plus there isn’t much context for their relationship. I get they have crushes and feelings for each other and have met a few times and have talked through letters. To me, it just seems rushed and doesn’t have much basis.

Facts to me it just feels like mc just really naive and thinking with his dick. She ain't show no interest in mc until he started showing influence. When mc family fell no one but his master was nice before mc gained power even that old granny didn't show interest mc in the past life or the second life till he gain power.

When his family lost power, he was a literal child…which means so was the princess. You expect a kid to take interest in another kid who they likely never heard of? Bffr now. And you keep mentioning his master being kind. Even she only took an interest bc of how pure his mana was in his regression. Kind my ass.
As for their engagement, you ppl can’t be serious. Don’t apply modern standards to the norms of the past. They’re literally in a fantasy medieval time period, with just a touch of modern details to make it interesting. It might seem rushed to you, but that’s looking at it from how relationships work during our time. It’s not the same. Hell, I’m surprised they’re only engaged and not fully married. That at least gives them time to fully get to know each other before they’re permanently connected.
The male lead and the princess’s romantic relationship makes no sense to me. They basically see each other what three times, just have crushes on each other, and then decide to marry? Like what happened to getting to know each other, then dating, then engagement, then marriage? There’s no background for their relationship what so ever. It’s too rushed.