I've seen some vids and pix. Well, "Hello" seemed not rehearsed coz they couldn't sync the part when they faced each other and bent their knees. "Missing You" doesn't sound like 2NE1's song. But was he making rabbit ears when he stood behind her while she was singing? Dara has left the stage during "Who You" but he sorta brought her back (or should I say he wanted her back?) when he knocked on the trapdoor where she exited while singing "I want you back". I think he didn't go near the audience during "Untitled". The last song where she joined him onstage again was "Sober", right? Another unrehearsed number, I guess, coz he was giving her instructions like going to stage left and asking her to sing some lines. It was, as mentioned in previous comments, like he or YG granting her wish to perform onstage after 3 years.

Now, after acknowledging everyone (where the lovely Dara amused him with her action while shouting "Ho!") he didn't do the bow pose like the rest. Instead he was kneeling or crouching down. And seemingly still haven't finished giving her instructions. I agree with the observations that he was planning something but either Dara didn't "get the memo" or refused to cooperate. Did the dancers usually throw confetti at him in the other concerts? It seemed they too "didn't get the memo". He didn't look pissed off though he said something like "Stop". He, Dara and the female dancers were looking at the male dancers when Dara finally stood up to walk backwards then said something like somebody won so it was time to go home. In the meantime, GD and the male dancers were sort of discussing on what to do next. Did they plan this hastily beforehand that the dancers seemed at a loss? Coz GD seemed to be waiting for them to do something. Did you notice the nearest guy doing something like a wave and a circle with his arms/hands? Anyway, I don't know why Dara said what she did, but the audience was chanting "Daragon". Then she waved at GD before walking away. And damn, her "walkout" actually ended the show. So who's The Boss, now? I mean it was HIS concert and she was just a guest! LOL GD and the guys stared (helplessly) at her and the girls before GD stood up in resignation and gestured to the dancers to exit likewise. He sort of slapped two of them as if chiding them for the fail. However, he did not leave the stage immediately. He walked to the side and talked to one of the production staff. I don't think it's farfetched to think they were discussing what went wrong. When he finally turned to walk offstage, it was only then that lights went out. Not the usual closure to a concert, I'd say.

Ok, now on to the Daragon theories. Well, it seemed Dara wasn't actually on the same frame on mind. Coz she probably knew or had an inkling what GD was planning at the end, but she walked out before GD and the guys could finally execute their plan. Leaving him no choice but to give up. Was it to confirm their relationship? To propose? But if it's the former, it should've been agreed on offstage or prior to the concert, right? If it's the latter, he should've just immediately done it, surprising her, instead of talking to her right before doing it. Did her walkout mean she wanted the proposal to be in Tagaytay? What about what she said? Somebody has won... Was their a bet or a contest? Or did she get inspiration from the confetti-throwing? Whatever it was, who won? Mr. Kwon? keke.

Now to the not-so-Daragon mode. Remember when Dara had a meet & greet in the Philippines hosted by her friend Robi? Remember her response when he asked how she looks like if she's in love or has seen her crush? I haven't seen her look that way when GD is mentioned or when they're together, even when she said that she'd thought of him as bf material coz he carried her snowboard. If Daragon's real, she's really good in pretending it's not. In fact, she acts more giddy when it comes to P.O.--well, when she's in the studio together with the other housemates. As for GD, yes he was acting shy and marshmallowy onstage with her. Even blatanly singing he wanted her back. But during "Hello" it looked like they're just friends and comfy with each other.

So the concert sent shippers to heaven. Yet no confirmation nor proposal happened. But one thing anti's should now accept: GD and Dara are indeed friends. Long-time friends.

UPDATE:

Wow...Dara just updated her IG with three pix of her and GD backstage or in the dressing room. So definitely not photoshopped. But the second pic though... She sitting, and he sort of kneeling with HIS HAND/S ON HER RIGHT HAND???!!! He's actually covering her right hand. But is that putting the ring on her finga? Is this the reason for her cryptic words onstage? Is this their way of announcing it? They were just cool and having fun in the car during his IG live then BOOM! she posts those pix...