The script alone is masterfully written. The lead and supporting cast truly get you lost in the storyline. The OST is perfect. Rowoon's version on YouTube truly showcases what a versatile talent he is. Park Eun-bin is brilliant in her delivery and emotional dynamics throughout. The close calls and nonverbal communication that display shared affections were palpable. This is how great production is done! The attention to detail was awesome! If you are new to kdramas, This is a classic must see!