Hey! its Finally Back...
I've returned from a hiatus and so has apparently Ultraman after first season got released back in mid 2019, damn its been quite long and i didn't remember much of the plot that took place in first season. However here is my honest review of Ultraman without any major spoilers.
The aliens behind it are the terrorist organization Dark Star. They transmit a message to those on Earth. "Give us half of the Earth, or sacrifice half of its people... make your choice." At the same time, the recently disappeared Rena and Shinjirou are teleported to the Dark Star ship orbiting the Earth.
(Source: MyAnimeList)
Now as a i reminder any prior knowledge is not necessary about Ultraman franchise, you just obviously gotta watch season 1 first. AS always all any level of support here on Hive is supported :)