Save with an unlocked gallery.
Notes:
1- The first save has all scenes except non-ntr route and the princess scene ( I missed it) So I played again and made a second save (save2) right when that scene is accessible, just use the farsight orb in your inventory and you'll see it.
2- The sailor scenes are not in the gallery but they're repeatable, just head to ocean town take a ride on the ship, and talk to Elli to see her two scenes (handjob + blowjob) or talk to the captain to see him getting railed.
3- You need to replace saves in the same spots for them to show up, so if you haven't played the game, run it skip the intro, and make two saves for you to replace.