Honestly im going to start this by saying the ending was a complete mess and all over the place. Drama starts off very fun and the plot seemed very clear in the beginning only for the director to completely throw us off the last 3 episodes. If your going to watch this, id suggest not finishing it because the ending wasnt very satisfying story-wise. The director would throw in multiple side stories out of nowhere only to completely forget them the next episode. The huge plot twist made previous events seem like they had no meaning like other users previously mentioned for example: the auroras, chanel, and the whole aspect of her being in uni.
Its sad because I really loved this drama and it was the first time i really enjoyed Nam Joohyuk's acting, but the writers had to ruin everything