The plot seemed very interesting to me.

But I didn't like the execution, Im Sol seems super desperate to me, a lot of things have happened to her in life but she is still very immature, literally their lives are at stake and she is not able to take things seriously.

It is super frustrating to see that the other male protagonist was only a decoration throughout the entire series.

It was not well explained how time travel works, and it is good that it is not explained in depth, but how is it possible that the two of them and the grandmother have memories but the other characters do not? If the murderer also had memories of him it could have been much more interesting.

Apart from the fact that the killer looks super out of nowhere. They don't tell you anything about his motives or his story.

The story of the brother and the best friend is not funny, it is super frustrating, no one behaves that way and if they do it would be super cringey