Watarirouka Hashiritai 7 (渡り廊下走り隊 7) was a sub-unit derived from Japanese idol group AKB48. Originally known as Watarirouka Hashiritai (渡り廊下走り隊), the '7' was tagged on after the addition of two members. They officially debuted as Watarirouka Hashiritai 7 on February 2, 2011 with the single "Valentine Kiss" (バレンタイン・キッス). It was announced that the group would disband on 14 November 2013, with their final best album being released on 25 December 2013.