Popular writer Saori suffers from chronic shoulder pain due to her demanding writing schedule and her large, soft breasts. To cope, she regularly receives in-home massage therapy. Her masseur, Shijima, appears to be a skilled professional, but in reality, he possesses a unique talent—using his massage techniques to seduce his clients. Under Shijima's expert touch, Saori is skillfully manipulated with persuasive words, gradually becoming addicted to the pleasure of anal stimulation. His professional approach completely captivates her.