Thanks for playing! Glad to hear you persevered.
Sounds like you've seen an ending for all five chapters. The blacked out pages in Apollinariya's chapter are inaccessible + the wheat field is the end of Cevahir's chapter. There are a lot of endings for Arzan's chapter but two main ones, and quite a few for Al's but it sounds like you reached one of them.
There's no big thing that happens once you've completed every chapter; you'll have to decide for yourself when you're ready to stop playing.