A K-pop group launched a lemon 30 kilometers above Earth. Heres how they did it.

If you thought K-pop comeback promotions had reached their limit, Hearts2Hearts would like a word.Ahead of the release of its second mini album, Lemon Tang, the rookie SM Entertainment girl group introduced fans to Tangy, an adorable lemon mascot who quickly became the unlikely face of the comeback. What started as a series of mysterious social media posts asking fans to keep an eye out for the citrus character soon evolved into one of the strangest album promotions in recent memory: Tangy was l