I binged it in a day . my thoughts on this kdrama is that you have to watch it all the way to the end for it to make sense , half of time in the show I was confused but when you finish the show it makes sense . This is a good show to watch if you are looking to just binge something or to kill time . This does have a happy open ending . I would recommend this to a person who isn’t looking for something serious also this show does mention sucide . it is a solid seven and a half out of 10 for me the chemistry was really good but other than that I don’t know.