Incredibly hard if you are going blind into doing this, figuring this out is incredibly fucking hard. The first ending is easy to get since it is the ending most people get, its the base ending, heck, its not even an ending at all. Now, the other ending is kind of hard to figure out since you need to follow Puro for the entirety of the game. To progress AFTER that part took me almost 7 HOURS to fucking come up with, and i had to watch 2 or 3 guides for it. After that, i just had to progress through the game (which the rest was not that part) and i did the other endings (i had 2 ppl in a call guiding me and a guide open on a chrome tab)
.5