Hello rollcakee,
If you reach a part of the story that says "The End" it means you reached a bad ending. I would rollback to the last menu of choices and try a different choice. Sorry for any confusion!
All the routes will end at the same amount of chapters so if you want to move to the next chapter you should read a message like this (at least until the the game is completed.)
"End of current content. More coming soon."
"Thanks for playing. Your feedback is appreciated <3"