View attachment 2711069
Trying to imagine this scene from the preview, I think what happened was that they were together talking and interacting normally in his room, and since everything was going well she tried to act as before, with intimacy, and that made him uncomfortable, he's not ready for this, not ready to forget that she left and came back like nothing happened, he doesn't mind trying to keep the friendship, but not like this, their relationship can no longer be like before, he clearly doesn't want to be just a fuck buddy.
And this particular render must be her apologizing and asking for another chance.
Before I thought she didn't see the MC as anything other than a friend, but reading some theories here maybe I was wrong, she also liked him but only realized it too late, and that makes more sense for the plot, if the MC got over her he wouldn't try anything with her, maybe even avoid her, but if she stays present, if she stays close, she puts herself as LI, she made a mistake and now wants to correct it, she knows he saw her as a girlfriend, so they can't just be friends now, or things won't go back to the way they were before, which is what she wants most.
My theory isn't that crazy, even I started to believe it.