Hyderabad, Nov. 6 -- One episode before bed sounds like a harmless plan, until a K-drama leaves you reaching for the next one. A dangerous secret, an unexpected romance or a character you cannot stop rooting for can quickly turn a short viewing session into a late night.

And if your watchlist needs a refresh, there is plenty to explore beyond the usual love stories. From students battling zombies to unlikely superheroes discovering their powers, these Korean dramas bring very different worlds to the screen.

Here are seven Netflix titles to add to your weekend watchlist.

School corridors become a fight for survival when a zombie outbreak leaves students trapped inside their campus. Starring Park Ji Hu, Yoon Chan Young, Cho Yi Hyun and L...