First of all, I barely write reviews, meaning that this drama is not like any other drama. I was recommended this drama when it first came out but I was never really interested after hearing about the 'time loop' plot thinking it would boring. However a year later when finally gave in to watch it, I was so shocked. All the roles and background stories of each character were incredible, to the fact that I suspected everyone. the background music and OST were also on point, making the scenes seem 10 times more suspenseful and tense. The drama showed different problems in life that affects children, adults, students, and couples... The story was short yet flushed us with soo many emotions, you will definitely feel how much each and every actor, actress, director, and screenwriter... put work into this spectacular show. I would 1000% recommend this show to anyone.