I would say Hidden agenda is a good series for a BL. No much complications involved, cute and adorable scenes ,tried to touch many plot variations but what confused me the most is a lot of characters just come and go with no much screen time or premise. Just randomly introduce a person and then just end it abruptly in one episode.
For a BL, it is pretty good. You'll get to see a lot of things here , trying to impress your crush, secretly liking someone, being bold and coming out , toxic stalker , family relationships , romantic moments and ofcourse Debate . But, few topics abruptly introduced and quickly ended .
Because nothing was focused more in the plot we actually missed to figure out where exactly did the title come from "Hidden Agenda". What we expect from the title and the trailer was least shown. Would have been a great story had they highlighted this a little more .
Last 2 episodes were a complete disappointment, the dialogues and scenes which were supposed to be thought provoking dint leave much of an impact which gave this series a weak ending.

Watch it , if you enjoy college series and JoongDunk chemistry on screen.