Use the found in the Storage room to break the wall on the 2nd floor and discover the truth about the tortured ghost girl.

: You have a limited number of actions per day. Don't waste them on repetitive dialogue. Focus on "Move" and "Explore" during the day, and use the "Night" phase for recovery or character events. Skill Points : Prioritize Rance’s Attack Power and Sill’s Magic Potency Save Frequently

: This is your primary way to interact with NPCs. If you're stuck, try "Assaulting" the character you're talking to—it often triggers the next story beat.