When I saw the cover I thought that it would be cute and wholesome. When I saw the trailer I was like" Oh okay then, not that cute but it still might have wholesome moments".
When I actually watched it... damn.
Don't get me wrong, it wasn't bad or anything but just very unexpecting. I actually really liked it more than I thought I would, it felt real. They were just trying their best to survive in their awful society and found comfort even though at first they kind of hated each other. It's not like the new Korean BLs out there where it feels like there isn't one person who is homophobic.
In the Night Flight you see a lot of homophobia and disgusting behaviors from assholes.
Maybe that's why I found it to be more realistic.
You should give it chance if you haven't seen it yet, it might be something you'll enjoy in the end.