"Genki de Kikoeru" is a real group. Their most famous song is "Genki de Kikoeru," which became a regional hit song in the 2000s and 2010s but wasn't a national hit at first. Their single "Koubi to Koi no Tsubomi" did well in 2014. They disbanded in 2019. So if the topic is about 2021, perhaps there's a revival, a new group inspired by them, or a cultural reference to their past work. Maybe the term is being used metaphorically in 2021, perhaps in a different industry, like fitness or entertainment, to represent energy and entry into a market.