Rereading from the beginning and with how much information now, I've come with a theory. The old man, who I assume is ML, is reading a crumpled and old letter surrounded by fireflies. Maybe they had gotten married on the island and decided to never leave, however she had died young from her illness. Now ML is reading her last letter and remembering the days the spent together. So it's a pretty tragic end, real bittersweet.
That makes hella sense, minus the fact that I actually think it’s the female lead as the old person in the beginning. Cause it says ‘women are supposed to be objects/marriage tools, and yet, I got married to someone I shouldn’t have.’
so I think she ends up living till she’s old, which would be so dope cause I’m sure everyone thinks she’ll die young due to her illness. I like this theory though
* villainess isekai trope
* FL regresses or transmigrates
* OGFL is a little sussy
~~ I only rmbr one scene so...~~
FL goes to give food to the poor with a ML(?) and a child comes up to take some food back. the ML was against that however FL argues that the children must be so hungry and starved that even if they eat their fill now, what abt later? which made him go WOW. because unlike the OGFL who he had taken with him before to give food to the poor said to a child, "eat as much as you want here" which may seem cruel in hindsight.
That scene sounds like a scene from "Anyone Can Become a Villainess" / "Behold the True Villainess". It happened pretty early on in the story.
https://www.mangago.zone/read-manga/anyone_can_become_a_villainess/
I think that happens in a lot of manhwa
But didn’t somethng like that happen here too? When she was giving out food with Winter (magic dude) Maybe you mean this.
https://www.mangago.zone/read-manga/death_is_the_only_ending_for_the_villainess/
* villainess isekai trope
* FL regresses or transmigrates
* OGFL is a little sussy
~~ I only rmbr one scene so...~~
FL goes to give food to the poor with a ML(?) and a child comes up to take some food back. the ML was against that however FL argues that the children must be so hungry and starved that even if they eat their fill now, what abt later? which made him go WOW. because unlike the OGFL who he had taken with him before to give food to the poor said to a child, "eat as much as you want here" which may seem cruel in hindsight.
So I looked up the raws and they are up to ch 15 now.
https://gammaplus.takeshobo.co.jp/manga/R18reijo/