It's one of those dramas that leave you with an open mouth and tons of questions right at the end.
Extracurricular... what can I say about it? I feel like there should be more. And apparently there will be another season. Maybe after that season has ended I'll finally be able to describe the experience properly.
To put it simply, though, Extracurricular was a very intense very crazy and very very good kdrama. The main lead, Oh Ji Soo, was a bad guy who wasn't actually that bad. Bae Gyu Ri was similar in that sense but offered a completely different character than other dramas have shown before. Both main characters were exceptional, so much so that despite their wrong doings, I was on their side the entire time.
The season finale showed something that can only be resolved with another season. Personally, I think I'll set aside my entire review for that time when we have more answers.
For now, I just want to say from the bottom of my heart that this drama was great. Truly. I await the next season.
Enjoy watching.