She’ll be caught in a love triangle between the older, mature teacher Shin-woo and the gruff awkward schoolboy Shin-woo.

Well this sounds interesting, but I wonder if the female lead will realize eventually that both of them are the same person. And if she does, it must be shocking to know that you're confused between two persons but it turns out to be the same person. It must be creepy at some point too. I'm gonna give this drama a chance since it's rom-com. ?

YAY! I actually really liked Lee Jung Shin in Cinderella and Four Knights...also it's a good year to be a CNBLUE fan, all of the members have dramas in 2017 :D

"Lee Jung-shin’s character, Kang Shin-woo, somehow goes back in time to his high school days when he met her, and is given the chance to redo history and set himself up with the girl of his dreams."

Manhole? Is that you?

Okay, first the actors are about the same age, so please, do some cool acting to at least look like the 10 year difference.
Second, please she can't have romantic scenes with the teacher, do not make him retrubuate the feelings. Because for me one of the most wrong things in life is when a teacher has an affair with the student, it's simply wrong. I think I will need to check to see If it's not what i think. Please, do'nt be what i'm thinking.

I guess, this would be the first drama where BOTH leads get the girl without any of them dying.

Wouldn't the older versions goal be to set her up with his younger self? How would having a relationship with the older version fix things in the present? It sounds cute but the plot isn't jiving with me. I'll definitely give it a go though. Maybe the drama will have an interesting explanation.

"...somehow goes back in time to his high school days when he met her, and is given the chance to redo history and set himself up with the girl of his dreams. "
sounds familiar and not in a good way :D

Lol how is he going back to himself ten years ago when they both look around the same age.

Student-teacher romance is an automatic pass for me :/

Seo Ji-Hoon!!! I like this kid in School 2017. That alone increases my interest in the show a bit.

It hasn't even started, but ahh that second lead syndrome!

So many School 2017 actors are already bagging their next projects, it makes me incredibly happy :') The thing about a project like that (School) is even if it doesn't bust the ratings roof, it's a great place that pools bright young acting talents, and a springboard to their careers.

Seo Jihoon is quite the acting chameleon, and he's really good at expressing through his eyes, so I can picture him in that awkward gruff role already. I've only seen Lee Yeol-eum in High School King of Savvy, and she wasn't too bad there, but her character was quite straightforward so it didn't leave a deep impression.

The story, while fairly familiar, could still be very charming if executed well, so fingers crossed for the cast!