
Do Won is such a sweet cinnamon roll and also I’m stiil waiting for her to call Seju “Unnie” ... and also in the last panel Who callled?

it was blurred by Gaji purposefully but I heard three main theories that:
1. The phone was Wons phone and that was Wons ex who wants her back which will make Seju have to fight for Won
I don't know how i feel about this... as much as I want to learn about Wons past, I want Sejus pain to end. Also I don't know if Won even has a phone and I wouldn't be surprised if Won didn't have a phone and Seju would have to teach her how to use one lol
2. The butler guy calling Seju to tell her what he knows about her and it could be either about the Seju's brothers deal with Won or some other past that was bad
If this were to be the ending hopefully just a small outburst then Seju finds that Won never took the money and then she goes to her at the beach spot that is Wons secret spot and they make up, having a moment like in paradise like when Seju ran to Sumin on the swings and they had their first kiss
3. Sumin (ugh no get away they are Seju is trying to get past u)
i really don't think its this one because 2 chapters ago the looks they gave to each other seemed like closure that they wouldn't meet again to interrupt each others lives
im torn because I am hoping its more drama because it's a sure shot way of seeing more of my favorite couple for as long as possible... buuuttt I do want them to be happy. Seju obviously has suffered so much, and Won is so caring and understanding and seems to have a dark past and has suffered. She has so much empathy for Seju that I can all but imagine how she could have been hurt in the past. I think Seju met her match and so did Won.
Personally I want to see in the next chapters them building each other up and their journey to healing instead of more drama. I am a sucker for happy endings tho :P

Come on guys...Won is more tech savvy then that. She uses this
https://imgur.com/xGCcTci

Whoever it is... it better not be Sumin... It really feels so unnecessary for those two to meet up again and have the one last talk over coffee, after seeing they are both fine and getting by without involving in one another's lives.
The popular theory is the servant calling Seju to report her what he found out about Won, specifically the dark past that she didn't feel like talking about. But then again, maybe that's a little too obvious. Perhaps the most interesting one is this phone actually belongs to Won, who left it on the table along with the diary, and the caller is from her ex.
At any rate, I doubt a phone call at late night cliffhanger is just nothing. Something bad is gonna happen. It feels like deja vu all over again, where Sumin was forced the sexy time and answer her phone in Ch10, finding out her parents having an accident.

Actually In my opinion it’s ok if it’s sumin..if sumin would ask seju to meet up with her it would be better if Seju would bring Do Won along w/ her and slap into Sumin’s face that She found somene else better than her..like look at my precious soft cinnamon roll Do Won she can protect my precious Seju unlike that small shrimp Sumin..

I don't think that this is the best solution, in my opinion. I mean, as much as I can understand the appeal of Seju showing Sumin that she's also trying to move on from their past relationship and was able to finally make such a big step as finding someone new that she's inserted in and who's interested in her as well, this scenario sounds very... well, like a middle-school drama, let's put it that way. There isn't really any need for Seju and Sumin to talk face to face right now - they pretty much said to each other everything that had to be said and them meeting another time wouldn't really add anything to their relationship (or rather current lack of it). Besides, Sumin already knows that Seju stopped being so focused on her like she was in the main story, since in chapter 119 she saw how Seju left with purple-haired woman and actually acknowledged that with a calm smile, like she's also relieved that her ex finally moved on and stopped giving up on meeting other people. And as much as we can sit there and compare Seju's relationship with Sumin to Seju's relationship with Won, in a "reality" of this manhwa they don't need to be juxtaposed, because these characters are not rivals in any way. Sumin has her own life with Sungji that doesn't need to be a part of One and Seju has her own life and own problems to deal with that are going to be explained, developed and hopefully resolved in One, cause this is her side-story after all. I think that if Sumin had to somehow find out about Seju being with Won, more realistic scenario would be her hearing about Seju's new business in news or some online articles through which she could just get the idea of how her life looks like now after she decided to quit working in Hello Studio. We already saw things like this happening in the main story, when Sumin found out that Nammi was dating someone because she read it in some online article. I'm not saying that this should happen, cause I don't think that Sumin finding out about Won needs to be an important part of Seju's side-story, but this scenario works better and definitely more mature than these two meeting, just so Seju could, essentially, show Won to her ex-girlfiend like this woman is some sort of her new trophy :/
Kabedon!