Somewhere in this world, no, somewhere in this world! There is a legendary hot spring where an angelic woman works as a bathhouse maid and heals the various troubles and fatigue of men... The name of this hot spring is "Aoi Kururugi Onsen"! This time's customer is a shy herbivorous man who can't take the next step and get a girlfriend. His dream is to go on a hot spring trip with a girlfriend Itsuka. So he asks "Aoi" to play the role of his girlfriend, and they practice on a role-playing date. As he teaches them how to interact in the changing room and in the bath, the two gradually take on an atmosphere like real lovers...