Story progression and relationships are entirely determined by your dialogue and action choices.
A major love interest whose path often forces critical choices against other routes.
Side characters with their own specific requirements to unlock their scenes. Critical Path Guide & Tips
You can pursue solo romances or specific polyamorous routes (e.g., Heidi/Athena/Mora throuple). Key Love Interests
Often treated as a pair; they are central characters with a "throuple" path available.
This is often cited as the most critical point. Going on a date with Zenda will typically lock you out of the Heidi/Athena/Mora "quadruple" path.