A merchant located in the Underground City in Nephlune. Aura can interact with him if she goes through the process of building Demon Worshipper Trust in the underground bar in Nephlune before entering the Underground City in disguise (20 Trust is needed to proceed past the bar).
Sweet Memories Drug: 800 G (can be replaced with Sweet Memories Drug+)
Lascivious Coating Drug: 400 G (can be replaced with Lascivious Coating Drug+)
Bloodshot Eyes Drug: 650 G
Blue Sugar Drug: 30 G (can be replaced with Blue Sugar Bomb+)
Aphrodisiac Drug Bomb: 100 G (can be replaced with Aphrodisiac Drug Bomb+)
Hyperreaction Drug: 500 G (can be replaced with Hyperreaction Drug+)
Items other than Blue Sugar are periodically restocked, check his About Restock dialogue option.
He will purchase Aura's drug-related Formulae through the Sell Drug Formula dialogue option:
Formula: Aphrodisiac Drug Bomb+:
Formula: Blue Sugar Drug+:
Formula: Lascivious Coating Drug+:
Formula: Sweet Memories Drug+:
Formula: Hyperreaction Drug+:
3 lewd scenes, plus one repeatable variant of the 3rd scene, can be done with the Drug Dealer. They all require Aura to have the Withdrawal Special skill. They each reward a free drug item of the player's choice (basic versions will be replaced with the upgraded version if the Drug Dealer has been given the relevant formula), which will be consumed instantly instead of being added to Aura's inventory. Only immediately consumable drugs can be chosen.