@reii well,
there was the memorial dungeon from eui jae's memory, they fixed it by living an everyday life together and saying goodbye with a kiss on the forehead
Then we saw one memory of the second (I think) timeline's cha eui jae, in wich sa young died. So eui jae decided to turn back time once more to revive sa young and save everyone, all that thanks to yesong's capacity, eui jae saying he will be the anchor of the third timeline (meaning he's willing to bear the weight of the third timeline).
Hong yesong tells him (within his memory dungeon, with his capacity apparently he can talk to the current eui jae don't ask me)
Meanwhile, sa young was alone with an unconscious eui jae which gave him a panick attack, and the kiss is eui jae finally (or not) realising his feelings for him (once again, maybe not) and kissed sa young to calm him down.
To sum up the timelines,
There was one (that we saw with ga young's (the young girl) fragment in wich eui jau died and sa young most likely turned back time.
The second one sa young died and eui jae turned back time.
And now, the third one where the kiss is happening.
