I decided to give it a try and wow! That game is something else. There's nothing special about the gameplay itself, it's even not that good but the concept of narrating your actions or having a dialog about the story and telling the story is extremely pleasing experience. Normally I would listen to podcast or open a YouTube video in the background as I play casual games. This is much better because your senses don't fight for attention priority.
Then I remember, in Half Life there were parts when an outside voice would talk about something relative(g-man or someone asking you do something etc.). Every game should have a narrator or some kind of background voice taking you deeper into the story.
Maybe that's part of the lure of game streamers?