To be Honest, I really didn't like the start of this series. I'm not sure whether I wanted to proceed after episode 1 and I even skipped Ep 2 (FR XD). I watched Ep3 onward and it's good. I wasn't expecting that I'd love it. I think I'm just really picky with how a story starts.

It's concept is sort of similar to Bad Buddy. Keeping their Relationship a secret as well as how they're both from opposing sides.

I'm gonna be listing what I like in this series base on my interests(lol). Despite me not liking episode 1, I like the concept of repeated history (the part where their seniors picked them and when they became seniors and had to pick their Juniors ).
I like how the main character is seriously thinking about his future (whether he's making the right choice) and not simply courting his BF to be. I'm into relationships(not necessarily romantic) with a specific past be it good or bad, so the second couple's interactions fits my interest. I also love the third couple's first venture into BXB relationship, how they're clueless how to do it with each other as they're both their firsts.