youngjae and yebin did a great job in portraying the characters. their acting was natural side characters were mind blowing too. overall an amazing drama. only complaint is the drama was very short and the focus on romance was less. but thats understandable as it was focused on certain aspects of high school life. will i rewatch this again? i still rewatch it from time to tie. youngjae as kim seunghyu did an amazing job i loved his expressions delicate actions and his handsome face. his action scenes were really really attractive. the ost day by day is sang by him and everyone knows his vocals are amazing he did a great job with everything. i really wish we got more behind the scenes and saw the cast impression, how the prepared for the role and what all emotions they went through while filming. promotions could have been better. looking forward to its movie version.