forever_:
I have this question that I want to ask y'all before this scene airs, how do you think Dalmi will react when she finds out that the Dosan she is with now is a random dude who "used" her for his benefits (getting Samsan into Sandbox), Jipyeong went to great heights to make this happen and it was her grandmother than orchestrated all of this, basically, everyone close to her manipulated her.
Personally, I feel like it will be a time when she feels like In Jae is right and it will be a major blow to confidence. She would really lose trust on everyone who she cared for and leaned on for support.
Do San isn't a random dude cause she know his existence but later communication of them before this series started is lie staged by her grandma and ji Pyung and while Do San didn't do anything but dragged into this and also he is playing the big victim then lying to Dal Mi. In case of Samsan tech they got into Sandbox by themselves while Dalmi had no influence in this while other dude Ji Pyung totally ignored their advancement toward Sand Box but started support them after they get into the project. So, Dal Mi and Ji pyung are not the reason Samsan got into Sandbox but the most reliable reason is the mysterious man Alex Kwon. That's how another plot got involve in this besides lying to Dal Mi.
Now, you think Do San is using Dal Mi?? My answer is, "it's definitely not". Do San let Dal Mi involved cause of it's will let Dal Mi could grow to her dream while take on her sister. Besides Samsan tech has nothing to do with Dal Mi because they didn't know what Dal Mi is capable of in first place. They started with no expectation but grow together and also they are in action of giving her a large portion of share of Samsan Tech and make her CEO without any benefit for them cause they are too dense thinking about this then get into Sand Box Successfully. There's no way using Dal Mi since Do San is the one who got her involved in first place as CEO instead of choose Dal Mi's sister "In Jae" who is more benefiting and secured in monetary way.
Last conclusion is what Dal Mi will thing after find about the lie? Let's talked about grandma and and HJP who both lied and Do San got involved. The think is she might blame any of them or not but it's doesn't matter cause there is other plot also involved. It will be not complicated as Dal Mi found about more then quarter lie they told and she will be more mature for judging them even after find out the full lie. It will get involved to another story of her grandma's illness and Mystery of Samsan tech got into Sand Box While lying to Dal Mi is nothing. She may or not lose trust but not understand that they done this because they cared for her will make plot more complicated Because she is too understanding and mature for this case. It should not going this way too long ignoring other issue going on also for next 10 episodes.