Watarirouka Hashiritai, the four-member sub-unit of idol project AKB48, is set to release their third single on November 11, titled "Kanpeki Gu~ no ne." It has now been revealed that one of the songs on the single is getting a tie-in with an online role-playing game.

The song, called "Bouken Et Cetera," will serve as the theme of Grand Fantasia, a game developed by EASYFUN Entertainment Corp. and licensed to Aeria Inc. In addition, a limited edition of the "Kanpeki Gu~ no ne" single is being released, featuring jacket art with the group's members in cartoon form, plus a ticket for a premium in-game item. There will also be in-game avatars for the collaboration, as well as a lottery for Grand Fantasia players to attend a special event with Watarirouka Hashiritai.

Besides the Grand Fantasia limited edition, the "Kanpeki Gu~ no ne" single is also being sold in a regular edition, a "regular" limited edition, and a FAIRY TAIL limited edition (the title song is the ending theme of the "FAIRY TAIL" anime series).