
Yes, we have a male lead but it's not yet confirmed. However, many novel readers are saying that the male lead is going to be the King, of course. And as a novel reader myself, I did see their chemistry and how she blushed in some articles whenever mc was talking to him. So yee, black haired dude is the male lead and she does lose weight but it was slow. And she also gets a dragon, and every dragon lovesn her because of how she treats them like making rooms for them and what not, changing their views on the right way to tame a dragon.

No, shuzel and her mostly had good chemistry yet you'll see the difference in like three hundred chapters that shuzel and the youngest seems to notice how different the king and MC's relationship with each other is. if you read the novel it's mostly the king thinking of making her his partner. And he's the one who keeps teasing her and making her blush but when it comes to shuzel, it's all about food because he liked sweets if I'm not mistaken

The translations were cut off and there's currently no official translation but I read the raws here https://ncode.syosetu.com/n7222ff/

So in the novel, the 'Friend of Nature' skill which makes him speak to the animals wasn't this detailed. In the novel, he could only talk to the animals once he touches them(would upgrade in the future so he would be able to talk to them like this in the manhwa) which is why there was a scene during the meet up with the minotaur king where he touched him to talk to the minotaur king. In the manhwa, he could talk to them and everyone was surprised but in the novel, they weren't really surprised as if Sejun understood them from the beginning. As for Keung calling him dad, it did happen in the novel since in the future, Keung would be famous for being the great black dragon's son(Sejun was mistaken as the great black dragon). However, Sejun thought 'Keung is still young so as he grows up, I'll slowly let him know that I'm not his dad' but I don't think it would happen since I've read to the current novel chapter and Sejun treats Keung as his real son. So unlike in the novel, it wasn't really detailed like the manhwa since author can't really express each animal's feelings by text because there's a lot of them I tell ya, but of course makes you imagine everything so I agree with this change but still worried since some details keeps on changing like the 'Friend of Nature' skill.

Here's the official translation of the novel but I didn't read the current chapter here since there's less than 300 chapters translated and the current chapter's 600+.
https://hangukhub.com/series/farming-in-the-tower-alone/

The payment mc will ask the Minautor King would be to use the point but because he started from the 99th floor, he cannot go down, he needs to go up but there's only 99 floors so he needs to go to the first floor first. He'll be able to get to the first floor using a land document but after a few chapters, if I remember correctly it should be somewhere around 400+ in the novel, I've read to the current so my memories might not be that specific anymore. Also, there was no mention of him going up by hunter standards as he goes from one floor to another using land documents.

So in chapter fifty, black rabbit gets the electric eel core for Sejun but here's the catch, black rabbit didn't enter the sea of dimension like in the manhwa, to be precise, there was a crack in the black tower in that pond connected to the sea of dimension like a teleportation crack and black rabbit was almost sucked in the sea of dimension. But in the manhwa here, black rabbit entered the sea of dimension and a part of Aileen's food only poisoned some of them, a shark suddenly bit the eel and almost swept him away which deviates some parts of the novel because Flamie, I won't reveal her whole identity first but she's the apple tree that sejun planted at the beginning and becomes the biggest figure in the future. So Flamie here blocks the sea of dimension so the black rabbit won't be swept away. In the novel, all of the piranhas and the eel inside the cave died which means the place should be a huge place but not yet the sea of dimensions. The aquamarines of course came from the sea of dimensions so I got a little upset with the manhwa since such details changed

There's spoiler below so proceed with caution and here's the link for the official translation of the novel so please support them: https://hangukhub.com/series/farming-in-the-tower-alone/
SPOILER
When I think about it, someone did die, it was a a lonely grape vine whom mc named so he was a little sad when it died after he named it. The grape vine is from another tower if I remember correctly, it should be the silver tower(There are 9 towers including the black tower) but no need to worry because the grape vine became the god of loneliness although mc doesn't know yet
I think the reason why she didn't see herself being happy with them or staying is because she originally thinks that she's supposed to die and her death might be related to princess's happiness. Also, it's exciting how he knows about her second name, he did saw it at their wedding heheheh he knows she's hiding something yet didn't confront her
that's actually kinda sweet