Masterpiece, best quality, ultra-detailed, sexual tension, erotic, 1 male sucking Yoimiya's nipple, close-up shot, blush, ecstatic expression, slightly open mouth, panting, moist lips, messy hair, flushed skin, delicate texture, sweat beads, intense body trembling, intimate moment, warm lighting, soft focus effect, sensual atmosphere, sensory stimulation, prominent details, contrast of light and shadow