This soap scent is based off of 'Moonlight,' chapter 42 of ShayaLonnie's amazing fanfiction, The Debt of Time.
"I don't understand," Remus said as he walked into the Room of Requirement—which was no longer a room, but rather what looked to be the outskirts of the Forbidden Forest. Everything felt so real: the smell of the grass beneath his shoes, the breeze moving through the leaves in the trees ahead of them, even the bright moon reflecting off of the water on the Black Lake.
Remus took in a sharp breath as his focus turned up. Painted across a sky of black velvet was the brightest, fullest moon he had ever seen with his own, human eyes. Something tightened in his chest, and he closed his eyes as he waited for the itching, the aching, the pain to come, but instead of sharp stabbing against his skin, he felt something soft, pliable, and warm.
"Love, look at me."