Maintain the consistency of the character (with the appearance and gender remaining unchanged), the protagonist clenches his hands into fists, his body trembles slightly, as if gathering some mysterious power. When the protagonist shouts loudly, his body begins to grow rapidly, his muscles gradually bulge, his figure keeps rising, his shirt is stretched open and torn due to the muscles, and the fragments fly in the air. The lower garment remains unchanged. Instantly, this figure becomes muscular. The protagonist slowly opens his eyes, his face shows a confident and powerful smile, revealing a strong arm and clear muscle lines of the arms, and smooth and delicate skin. The close-up shot captures the changes in the protagonist's facial expression and the process of his muscles gradually bulging. If the main character is a female, she must wear a bikini bra.