Scenario 2 is a threesome.(Double penetration)
I have already unlocked it.
Your hint is that it's an area where the typical ground is white. Past a save statue from the entrance.
In fact, use the save statue BEFORE you start looking around for this, because that release had issues with the two events that may make it impossible to move after you get the item. Use Ben's teleport spell if that happens; you did get that from the Goddess already, right? Of course, those errors have been fixed in the BHRE.