「I've only filmed a few AV films...」 Saeka-chan, a rookie AV actress, has little experience and is a little nervous. For her, this time is a special first experience play. "Onahou?" "Iramachio?" She is bewildered by the content she hears for the first time, but the eros instinct sleeping within her awakens, stirring up the men's desires and confusing numerous cocks one after another. An AV training documentary following the first time of "Mashiro Saeka".