I think this will have many time skips or timelines since we are on episode 6 still 10 episodes to go and we will…
there r only 3 chances so not many time travels, this is her 2nd travel so it has to be timed well.. she has to have enough information that SJ was murdered so that in 3rd time she can save him
i just realized we didn't get the scenes from the preview, i think, of TS and SJ where TS asked SJ if he also likes Sol and they were together (its a night scene and they were being childishly competitive)
which means, this might actually be 2nd time travel indeed...
because in this time travel we have not seen TS confronting SJ at all... unless first half of ep 7 is all of that and Sol time travels at the end of the ep
but she has saved sunjae according to the preview, has she not? I don't think either of them will forget anything.…
or she just didn't time travel this time
they stopped talking because SJ was angry and guilty
Maybe 2nd time travel has yet to happen because purpose of 2nd time travel has to be for Sol to know that SJ's death is not suicide... if she time travels now then murder plot won't come out
Lastly, there has to be a specific trigger point which leads her to time traveling back in the future. I think it is the kiss... same as how SJ's true love wishes must have manifested itself via the watch
but she has saved sunjae according to the preview, has she not? I don't think either of them will forget anything.…
looks like the same day of the concert but morning.. so she has a day with SJ..
Reminds me of the romance movie with george clooney and michelle pfiffer - one fine day
But other posters are right, Sol saves herself; may or maynot be able to get the cabbie arrested; SJ felt scared with all this that happened...probably kissed and she time traveled back to future; 19 yr old Sol does not recognize SJ and Sj feels angry....
On day of concert, movie conversation was happening in original timeline as well. Sol and SJ interact ; both remember everything; but SJ still dies.. and Sol learns some things before time traveling for the 3rd time..
also, think she will change her time capsule letter to hint at the murder
if it is murder then cabbie must return. Otherwise it is Sol ringing the bell or SJ
as it's a romcom i don't think they'll drag the story too much towards thriller, mystery. :))
but feels like cabbie plot ended too quickly... didn't make sense to have it only.. we have 10 more eps. to go... i think cabbie may come back in the actual timeline and she would struggle because she can't predict
Celebrity 
this explains it best.. simple explanation behind serial killer (this arc may end here... not much into this)... and reason for insomnia etc...
bottom line, he just needs to be in a romantic relationsip with Sol to solve all his life problems
the day she time traveled for the 1st time, day of concert, her watch actually switched on and flickered once she got it back from grandma
just some dos program from the past infected with wokism or maybe the "trying to sound cool" virus
which means, this might actually be 2nd time travel indeed...
because in this time travel we have not seen TS confronting SJ at all... unless first half of ep 7 is all of that and Sol time travels at the end of the ep
they stopped talking because SJ was angry and guilty
Maybe 2nd time travel has yet to happen because purpose of 2nd time travel has to be for Sol to know that SJ's death is not suicide... if she time travels now then murder plot won't come out
Lastly, there has to be a specific trigger point which leads her to time traveling back in the future. I think it is the kiss... same as how SJ's true love wishes must have manifested itself via the watch
Reminds me of the romance movie with george clooney and michelle pfiffer - one fine day
But other posters are right, Sol saves herself; may or maynot be able to get the cabbie arrested; SJ felt scared with all this that happened...probably kissed and she time traveled back to future; 19 yr old Sol does not recognize SJ and Sj feels angry....
On day of concert, movie conversation was happening in original timeline as well. Sol and SJ interact ; both remember everything; but SJ still dies.. and Sol learns some things before time traveling for the 3rd time..
also, think she will change her time capsule letter to hint at the murder
if it is murder then cabbie must return. Otherwise it is Sol ringing the bell or SJ
You have no grasp on characters and sthg that does happen in real life... her being the way she is with SJ is apt