Due to a mistake at the hot spring inn where he was on a business trip, he ended up sharing a room with a female employee! And the bath was mixed bathing only!! Then, a series of unexpected happenings led to him witnessing a naked female employee! And what's more, her unexpectedly large breasts caused a full erection! The female employee's gaze was glued to his arching erection, causing him to become aroused!! She approached him night after night, seeking his erection!