The main issue I have with this dorama is that, until ep.8, the only interesting things about it were the scenes with Romaya-sensei and the ever-changing BTS clips shown during the closing credits (BTW, great song, seriously!). Dull script, unappealing characters and an annoying plot (or rather lack thereof) made it a real pain in the you-know-what to keep on watching until that point. Luckily, though, I didn't give up, as things picked up very quickly from then on and the last episodes were like a fireworks display reaching its climax. Now, how to grade something like that? Seven painfully slow and uninspiring episodes would deserve a "3" or "4", 4 very good episodes could get an "8" or even a "9"...I'll go with something in between and give it a "6". Self-reminder in case I'll ever decide to rewatch it: watch the first ep., skip the next 6, and enjoy the rest! :)