In November 2004, Aoi left Alice Japan and Max-A to move to the newly formed studio, S1 No. 1 Style, part of the large Hokuto Corporation. Her first video for S1, "Sell Debut", was directed by Hideto Aki and released on November 11, 2004. Aoi continued making about one video a month for S1 until mid-2006. By this time, Aoi had become one of the most popular AV idols in Japan. Her name was the second most popular internet search on a female celebrity in Japan for 2005.