[Silent girls who are taciturn and weak against pressure are the kind of creatures that you can't talk to anyone about] Sakura, who has large breasts and is suffering from stiff shoulders, is introduced to a personal gym run by her father's friend. She has a shy personality, but when she heard that she would receive one-on-one instruction, she felt at ease and began attending the school, and her physical condition improved, and her parents were grateful to her teacher and trusted her, entrusting their daughter to her. Under such circumstances, the body touching is becoming more and more intense.