[Panel 1]: top panel, inside the elevator, front view, A standing on the left side, B standing on the right side, wide distance between them, relaxed and completely indifferent postures, ignoring each other, elevator doors are wide open, A is looking down at a smartphone in hand with a blank expression, B is standing casually and staring at the side wall mirror, no interaction, independent actions, [Panel 2]: middle panel, outside the elevator, building hallway background, front view of the elevator shaft, the metallic elevator doors are completely closed from the outside, no people visible in the corridor, a small digital floor indicator arrow glowing red above the door, clear separation from the inside, showing the closed exterior of the elevator, silent atmosphere, [Panel 3]: bottom panel, close-up shot, front view, eye level view, foreground elevator doors are half opened, inside the elevator again, the elevator doors are opening, unexpected scene, A has moved to the right side, A is holding B's waist, B is pinned against the elevator wall on the right, sudden surprise, both A and B suddenly stopping the kiss and turning their faces to look straight at the front camera with wide shocked eyes, caught red-handed expression, blushing cheeks,