w failed to deliver many things and the main thing for me were the characters. none of the characters seem fleshed out, and their relationships felt surface-deep. cheol and yeonjoo didn't seem like they had any real connection, like i didn't feel any chemistry at all. their relationship did not seem developed at all.
another thing was the nonsense of it all. bad things were constantly happening and our main leads never got to take a break. i wish there was at least a moment where they could have enjoyed being together and got to know each other more, but it's villain after villain. some of it didn't make sense to me and things could have been better explained. the ending was kind of mid, i didn't even realize it was the last episode until there was no more.
performance wise the acting was cringe to me sometimes. it was so "kdramalike" the way their eyes move and the way they'd smile at nothing, or thinking out loud.
all in all i think the first episode set the tone for the rest of the show. didn't expect much and i was right