Premise is interesting about time travelling so the father can save his son from the impending suicide.

Let's go with the negative first. While it is an eye-opener about teenagers having suicide and the lack of parent's understanding of their child, I don't get the point of the father using sex as a tool to save his son. He had sex with all the guys in the story, except his son and the man who controls time. Sure he is desperate, and did everything in his power, but I think too much time travelling made him a whore. In one of the timelines, in the attempt to save his son, the son even sees his own father having sex with his boyfriend like WTF. Talk about a mental damage on the son's part.

Some scenes cringed me with the sub-par acting. Although the actor who plays the father, son, and time man did okay. The others? Drowned to oblivion. They are like reading the script while the camera is rolling.

Now the positive side of the drama, acting is good, and the overall message of the series is great! However, I think the conflict can be solved quickly and the drama can be cut in less-than an hour, if only the father investigate first the source of his son's suicide instead of jumping to conclusions.

Music is repetitive and dull. They use the same sounds in the sex scenes and the suicide scenes. Oh, did I mention that it is flat, mundane. and prosaic? Yes I know I use words with almost the same meaning, which makes me more creative than the repetitious music that they used.

Overall, it's not a horrible film. The muddled execution is the problem why it didn't achieve it's potential. Take this with a grain of salt, watch it and be your own judge.