Azusa Mizuki, with her 93cm G-cup breasts, begins meticulous training to become a busty boxer! First, she uses vaulting boxes and balance balls to strengthen the muscles and endurance of her voluptuous chest. She builds stamina through swimming and improves explosive power with tennis drills. Additionally, she hones adult techniques like titty fucking and tit-jobs to prepare for real combat. Finally, she faces off against her trainer in intense practical training, putting all her newly acquired skills to the test!