Then I realized what was doing that to me.
The sky was a lot brighter than it was 4 hours ago!! I was confused and considered all possible suspects; from the" the beginning of the end of the world" to a supernova explosion of Betelgeuse.(well, it's not unthinkable)
(Of course, obviously it's very bright at night in Shinjuku. That was probably the reason, but that's not so interesting as the ones I listed, isn't it?)
So I got home, and something made me look to Shinjuku from my house(on the 8th floor).
Yep, there was this giant, fuzzy, glowing cloud above the city!!
I started suspecting UFOs again when I realised they weren't scientifically possible.
So I told the story to my geology teacher, and he said he noticed the phenomenon too, and taught me that it was just haze at a very low level from the ground, and that they were reflecting the lights of the city.
So the next time you see something like this, be sure to think again before pointing fingers at UFOs.