Living Underwear

How to use them
One or more items must be equipped first. Once equipped, they can't be removed the normal way.

After being equipped, use the Flute (available from the Items menu) to set their status. You can give it one of the three possible commands:
 * Excite them. Activates the living underwear; while in this state, they would automatically produce lust at random intervals.
 * Calm them. Deactivates the living underwear; it remains dormant, but still can't be removed the normal way. In this state, they are look identical to the normal underwear.
 * Remove them. Removes the living underwear, putting it back to your inventory. It's the only way to get rid of them.

Colour variations

 * There's only one variation for each item. All items are visually identical to Black Bra, Black Panties and Black Thigh Highs.

Where to find

 * Marin: Can be bought from her after passing her first challenge. The price depends on the quest's results, with default price being 1000; she would raise the price if annoyed too much, and lower it to 800 if Lust Doll pass the quest ideally.
 * Dalvie: If female partners sanctum was disabled, the underwear set can be bought from Dalvie directly. They would give the underwear itself for free, but would demand 1000 for the flute (which is required to control them) when Lust Doll returns later.

Plot role

 * Full set of magic underwear is mandatory for Marin's first challenge.

Other related scenes

 * When visiting the Gallery, if Lust Doll accidentally destroys one of the art objects and agrees to pose for the rest of the day instead of being fined, it would be acknowledged what it's not possible to remove the underwear, so they would pose in it. The overall scene is mostly the same, however.