
So instead of me reading this all over again... what happened?? Did the director become immortal by drinking the blood? Or did his blood just turn different enough for Yoon to be able to drink it and survive? And if that's the case... will Yoon live longer than the Director? Or will Yoon have a human lifespan??? I think I missed something major. And I'm lost! Help!

Nope. Director and yoon is half blood. Yoon originally a mix breed and director is a mutation after drinking the blood. But from the conversation between yoon and jooyoung its likely that they will die as a human does. only nux is immortal. And other vampires could live longer/immortal too as long they leave human world and go to the vampire place. Remember when jooyoung said that he doesn't know how to maintain yoon's life? He told director that yoon will leave human world and will never come back after he couldn't find the solution to keep yoon alive? It's the same on the recent chapter when yoon said about his death. He will die as human as long he live there. So does director. About how yoon could survive,. Surprisingly directors blood is compatible with yoon the same implies as how he used to absorb the essence from sex.

From what I understand (and anyone feel free to correct me if I’m wrong), our little vamp isn’t fully vampire, so he’s curse to drink blood to survive yet he is not immortal. The director’s blood was changed by Nux’s blood so Yoon can live off of it, no immortality either. They’ll live like humans, but with the twist of Yoon needing to drink the director’s blood.

WHAT THE HELL IS HAPPENING?!?!
I am horrible with names so I will be describing them. The main uke is in love with the main seme right? So why did he sleep with his EX seme??? Who is married?? He has no idea what is going to happen after his pushed his main seme to get married (who ISNT married btw) but he is going to join into another bad relationship with his ex seme?? WHO DID I MENTION WAS MARRIED!? And why did the ex seme take him from the hospital like that? Taking advantage of him while he is weak first of all but the uke knew what he was doing (going so far as to say hurry up?!?!) And I want to know! Did the "ex uke" of the baker, die? Or what happened? Did I miss when they said it? And WHY is the "old friend from school" so interested in their relationship what was over so long ago? Wasn't he the one who pretty much ruined it?? I'm so confused....

Ah, well the main uke found out that the main seme (blondie rich baker) was using or being nice to the main uke, because he felt guilty/had lingering feelings for the ex-uke (abused cocky kid).
{Who died, at least I think. The author might bring him back for drama. ┑( ̄へ ̄)┍}
The ex-seme (sunbae with pretty eyes) is/was married, he may have gotten a divorce or he is just plain cheating. Haha. Asshole.
The main uke is also having problems, he doesn't know if he is in love with the main seme (blondie rich baker), or using him as a substitute.
The main uke has some complicated feelings about the ex-seme (sunbae with pretty eyes) therefore he is sleeping with him.
I also noticed that main uke has a sliiiigght problem with being weak to pushy assholes (especially when he is angsting or feeling sick.)
The old friend from school is trying to make nice to alleviate his 'guilty feelings' or is just being a nosy asshole.
Hope I didn't make it too confusing. I used descriptions instead of names, so hopefully that helped.
Someone tell me if I got anything wrong. I just got around to reading chapters 30-41, so I may have forgotten some of the story plot from the previous chapters.

Well, that's what the sister (who turned out to be a bit more than a bitch) said to the main uke. I don't think the main seme confirmed or debited that his feelings we're just a projection of what he felt for the "dead for the moment" uke. I think he actually cares for the main uke, but I don't know.
But yeah, good summary, that's pretty much it.

Okay so the main uke still loves Sunbae (ex seme)? But "might" love the rich baker (main seme)??? What was the point in getting us to LOVE the baker (and having the title be what it is) if he is just going to go back to Mr. cute eyes (who we couldn't help but HATE becuz of how much of an asshole he was to uke)?

The main uke is conflicted, he wonders whether he is actually in love with the baker or if he is just using him as a substitute for his senior (Mr. cute eyes).
The more we love the baker, the more shocked and upset we get when we find out his true colours. Some mangakas like to start off twisted/dark/dramatic stories with semes/ukes that are lovable, just for the plot twist later. As for the title, well it is about
the baker on the first floor.
Just because the main uke is sleeping with the senior, doesn't mean he is now going to end up with him. Haven't you ever read a manga in which the uke slept with the ex/second seme, while he was involved with another seme?
As of yet, we don't know which seme the main uke will end up with. I'm guessing the baker, but who knows? ¯_(ツ)_/¯

It is true that the sister was the one to tell the main uke about the ex-uke (can he even be called that?), but I kind of feel the main seme is/was using the main uke as a substitute. Sure, the main seme probably does have feelings for the main uke... but I feel like he cares BECAUSE the main uke looks so much like the ex-uke.
Sorry, I can't really explain it that well, I know what I want to say, but I can't put it into words. Ugh. Basically, I don't really trust the baker or his feelings. In fact, I don't trust anyone's feelings in this manga, including the main uke. Everyone is either a bitch, an asshole, or an indecisive adorable person who deserves better people in his life and should just run away, find a nice guy, and make gay comics.
Yaaasssss daddy!!