31-year-old, obesity specialist. He retired from sports due to a swimming injury when he was a child. Later, he studied hard and was admitted to a medical university.Although he has a sense of mission as a doctor, he does not want to see blood, so he becomes a weight loss specialist.Because of his professional personality, he always listens patiently to others.One day, a girl appeared in front of him.He treated the girl as a sister rather than a patient and became close to her.