Masao is a masochistic guy who loves cunnilingus. Skilled in massage, he's nicknamed "Masao" by the girls—meaning "the guy who gives massages." However, to them, he's nothing more than a cunnilingus tool. His tongue is used merely to pass the time or as a lower-body accessory while the women leisurely read books, treated like an inanimate object. This is the cunnilingus manifesto of Masao, a man who finds happiness in being used. Tonight, once again, Masao will be utilized somewhere as nothing but an object. The story unfolds through the eyes of the women who desire his cunnilingus skills, each encounter playing out like a narrative of their own.