An interesting television series. Not your typical Japanese drama. There were some twists and turns and made you guess who's pretending or not. The cast of characters were well portrayed, albeit some personalities were creepy or weird! (typical of apartment residents I suppose). ;p
It is a 2 season series and even the ending of the second season makes you wonder if it is truly the finale. :)
It's a mixture of light comedy, mystery, dark humour, and naturally, it is a whodunnit. Different camera angles add to the suspense. The OP song is well done and catchy.
I warn you... Once you start, you'll want to watch it in its entirety in one-go. Just like one of my favourite other television series: Signal (Korean and Japanese versions).
Highly recommended!! Two enthusiastic thumbs up! :)