Back at home, when he has time to examine it more closely, it quickly becomes obvious why this ritual never turned up in all his early research. It's not a typical soul summoning ritual. It's not a cultivation ritual at all; as Nie Huaisang puzzles through it, the closest category he can put it in is folk magic...not only that, but sex magic.

Huaisang pulls against the heavy, taut drape of the hanfu’s collar and the layers underneath, revealing barely a triangle of his pale clavicle and shoulder as he fans himself from the heat. It’s a tantalizing strip of skin, and before Mingjue can drag his eyes away, the glint of silver catches his gaze. Is that - ? Mingjue only gets a glimpse. Nestled between Huaisang’s skin and the gauzy white inner robe, there’s a strip of silver-black. A strap. A - a bra strap. It burns at the back of his mind for hours, like an ember in the dark, a glow he can see even with his eyes closed. What is Huaisang hiding, underneath all those layers?

He didn’t know until this moment just how much he wanted Mingjue to ask for it—for anything—to take the reins Huaisang has been holding out for so long and pull them tight and demand.