I don't know why most Korean movies don't show a logical storyline. The entire story is shitty. If such Korean movies like romance came out to be a shitty storyline, better go watch porno romance, that's even better. Story structure! Story structure! Story structure... is the utmost important thing! All these ratings with 5-4 stars really don't appreciate what is called a good movie! So dumb*k
The storyline isn't clear, all messy. Out of nowhere suddenly that boy can control the metamorphosis because he could control the urge, suddenly can't. Then suddenly that crippled man can run towards him and hug him. What kind of logic is this? There are a lot more to say which part is without logic. A good movie is supposed to convey a message to the audience clearly and with logic to exert exaggeration like some kind of superpower. That's the way such as Avengers. Sweet home sweet stupid.
The ending is horrible. Not in the sense of being horrified by the monsters but horrified by the stupid ending.
Overall, totally suck. Not worth watching. BTW, Netflix, you are stupid, don't label it with nudity. There's no nude except that woman taking shower without showing her tits, those have been blurred.