Korean Drama "Monstrous" has the right vibes and an interesting concept, however, it was too rushed.

The drama has nice cinematography, dark and close to a gothic horror mood. The main story is also compelling, being well entangled with the characters' own backgrounds.

However, the drama was too short for the story. So, more often than not, it was rushed, with a rushed ending and fast paced presentation of the characters' stories.

The performances, on the other hand, were all enjoyable.

So, overall, five out of ten.