I manage to got most of the endings except kenzan's good ending 😂. It took me eighteen-th tries to got it without the guide (yes, i counted my gameplay lol).
[Spoiler]
When i tried to use the guide, though, there was some error in "Shout", then "up to the mountain". It said it was suppose to be the way to get kenzan's good ending, but he's still got shot. So, i tried to changed it by keep running and go to the station, and it worked. However, that was just a one time thing before i tried to got it with a mix from guide and my own gameplay again - the result was kenzan got shot. I think there's a bug in kenzan's good ending route, dev.