just amazing, and this drama definitely deserves more praise? the story itself it's very fresh but yet relatable during times of COVID19. I think it's a first in it's league because i think so far there isn't any drama of this sorts currently.

Story & Acting
The story itself is relatable to current times, but with more scientific side of things. So apparently theres an outbreak of mad person disease stemming from a pill called NEXT. Infectees will have bursts of thirst for human blood. What happens here is residents of the apartment are quarantined under the pretext of containing the virus. However, it's really such pressures that brings out the ugly side of humans and also the humanity side of to nobles.

Needless to say, Saebom & Yihyun are really a saint having to deal with a whole load of crap and even going lengths to restore order and protect a bunch of inhumane people. At the end of the day, it really shows that some humans t themselves are monsters rather than the infected. I would like to point out some characters, and seemingly their development:
- na soo min and na hyunkyung: honestly, i was pretty annoyed at the start at how shameless the brother was. However, things changed after he got infected. He starts to repent and show care for his sister! There were even times where he stood out to protect him. He was also very human himself, hiding at first to prevent others from getting hurt because of him.
- donghyun: bro, seriously i got so annoyed the way this guy screws things up with his stupid livestream and how he treat his parents. tho subtle, there was definitely some growth in his character. the way he realizes that happiness doesnt comes from fame, but being with his family :) i was touched at how the parents loved him unconditionally despite his state and how he treated them.
- sehoon: one of the characters i found sus at first, but turns out to be a kind hearted man. he didnt deserved to get killed :(
- haesong & soyoon: this lawyer jerk really deserves to get dumped by soyoon who deserved much better, the way he looks down on people and his own wife was blood boiling. glad soyoon made the right choice to dump him !!!
- jungkuk: honestly i was quite disappointed with how his character was midway, but i got to agree he is one of the most relatable characters? his insecurities and fear forced him to waver between siding with the majority and saebom + hyun.
-oh juhyung: wtf this character is just pure villian and stirring lots of shit during the whole lockdown, but got to say his acting was great enough to make me despise him
- apartment rep: idk her name but she's an obsessed woman with authority while tryna look classy but failing miserably. villianious and crazy right til the end
- andrew: no words for this psychotic murderer
- jisoo: omo the pretty and capable lieutanant and saebom's awkward friendship
- han taeseok: i hated and love him, you get it. but ultimately, he loves his wife TT

plot wise, i was hoping them to answer some of the questions:
- so how do we determine who gets infected after eating the NEXT pills?
- also, the govt intervention was minimal ... while the outside doesnt seem to be on lockdown, there doesnt seem to be enough efforts to rescue the residents inside... mostly saebom & hyun saving asses..
- the romance could have more built up actually? like i mean I am happy but they could have gave more development instead of a sudden realization ..

Overall, i really enjoyed the drama, though i thought more explanation could have been done and also, i was hoping for clarifications or enlightenment on why this drama was called happiness? because the happiness logo seems to be fading.. idk but it was a great experience :D