Lewd Route:
Here's my save right before the lewd route starts.
Flag 1: Walk up to the boss and commit suicide with the last skill.
After you've been captured, collect h-scenes. Don't forget that you can clean your body (with ミラクルウォーター or the change appearance key item) - doing this unlocks more h-scenes in various parts of town.
Once you've
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, escape the slums through the warp gate.
Flag 2: After you leave through the portal, proceed through the game as normal. However, before you begin floor 6, commit suicide on a random enemy to set your HP to 1, go back to floor 3 (boss area). Make sure you have 1 HP, are only wearing an inner suit (not broken), and have ero markings (set via the change appearance key item.)
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there (they are all over the place). Just keep guarding until he activates the new h-move. He will take pictures of your graffiti'ed ass and run away.
Proceed through floor 6 and collect the orb to officially start the lewd route.