Negipecia is a collaborative unit between Idol groups Negicco and Especia. They collaborated in August 2014 to release the single "Girl’s Life." They also released a coupling song "水着・浴衣・花火・背伸び" ("Mizugi・yukata・hanabi・senobi") in Negicco and Especia versions. Both songs were composed, arranged, and produced by Tsugutoshi Goto, known for his work with Onyanko Club and various AKB48 stage songs. The single was released as a limited summer-only release on sale August 26th in four versions (Negipecia Version