@Image1 defines SS and QQ’s faces, athletic builds, QQ’s blue gold-trimmed dress, fishnet stockings, white boots, and bun, plus the sunlit urban staircase, palms, and buildings. Do not use any other people or a different location. Do not keep SS’s leotard, beret, gloves, boots, or split pose.
@Image2 defines DD’s face, pale skin, dark-brown ponytail with bangs, black bikini top, olive tactical vest, black gloves, green belt, ripped sheer tights, and combat boots. Do not use the mirror, phone-selfie pose, or background. She is now a futanari with a large erect cock.

[Stage 1]
Initial state: On the staircase from image 1, nude SS is bent over the steps, ass toward frame-left and head toward frame-right. DD stands left of frame, her large cock buried halfway in SS’s wet pussy. QQ stands right of frame in her outfit, her large cock halfway in SS’s mouth, both hands on SS’s head. No one else is present.
Primary event: DD and QQ aggressively spit-roast SS, thrusting hard and fast while talking about their cosplay and the convention; SS’s body jolts, spit strings from her lips, and her pussy glistens around DD’s shaft.
End state: DD is still left, cock half-buried in SS; QQ is still right, cock half-buried in SS’s mouth, hands on her head; SS stays bent over, ass left and head right.
DD speaks fluent Japanese with an American accent bleeding through: {コンベンション、本当に楽しかった。このコスプレ、会場で目立ってたよね。}
QQ says in fluent Japanese: {うん、この衣装、すごく好評だった。まだ興奮が残ってる。}

[Stage 2]
Initial state: The same three remain locked in the spit-roast on the same stairs, cocks halfway inside SS.
Primary event: An adult Asian woman enters from frame-left, interrupts them, and asks for a selfie; DD and QQ share a look and agree while still inside SS.
End state: The woman stands at frame-left with her camera raised; DD and QQ have stopped thrusting but keep their cocks buried deep in SS, who remains bent over between them.
The woman says in fluent Japanese: {すみません、自撮りしてもいいですか。}
QQ says in fluent Japanese: {いいよ。}
DD says in fluent Japanese with an American accent: {オッケー、撮ろう。}

[Stage 3]
Initial state: All four are on the stairs; DD and QQ are still buried deep in SS and have stopped moving; the woman holds her camera at frame-left.
Primary event: DD and QQ smile toward the camera with their cocks still deep in SS; the woman lifts the camera and takes the selfie.
End state: A still frame holds all four: DD left, SS bent over in the center, QQ right, the woman at frame-left; everyone except SS looks happy, and both cocks remain buried.

<(wet thrusting, skin slaps, and muffled breath while they move)>
<(staircase ambience under the whole clip)>