Aww! That's so romantic that the heroes and heroines decide to be more than friends like they know each other for years, months, weeks or couples of days. It always start with Being in Love, Love Unrequited, and Childhood Friends Romance before they become platonic friends which that depends on the story. Mostly, they do started out as platonic friends while the main protagonist fall in love with someone else or villainess before realizing that he was in love with his platonic best friend or childhood sweetheart.
Sometimes, it can start with a bad rocky upstart at first when they don't get along or just don't like each other.
But later on, they started to understand how they feel or what they're going thought like they have something in common which it make them realize that they want to be more than platonic friends. They want their platonic relationship to turn into a romantic relationship.
- Humilitas and Dace form a friendship through their journey in the first Good Wolf game, the two would being to fall for each other in Other Wolf and finally become an official couple at the end of Assassins with Heart.
- Astraia and Naoki formed a friendship in the fourth game which eventually grew into romance as the series goes on, finally becoming an official couple in seventh game.