If you tell me more about the or engine (Ren'Py, RPG Maker, etc.), I can give you technical steps for implementing these!
: An optional "Hint" system for players who want to ensure they hit specific story milestones.
: Actions in public (as a "Passerby") affect your standing and available interactions in the classroom.
: Unlocked by finding specific items in the environment that trigger "Flashback" scenes. Visual & Immersion Upgrades