Board Thread:Questions and Answers/@comment-26987945-20150915025621/@comment-5379319-20150917000228

Emelita route should be easiest to get simply fail the requirement of all other route.

Yuela route requires: (need to be completed before end of chapter 3) If pass the point of no return, just finish the game then NG+. (no point of wasting your hard work)
 * Yuela's event at chapter 2 or 3.
 * Measurment event (on the first gameplay)
 * Uya and Melodiana joined the party