XII Constellations.

XII Constellations is a Chinese boy group managed by Cast Planet Entertainment. The current lineup includes Vento, Eurus, Mars, Vulcan, and Notus. Additional background says that XII Constellations is to eventually have 12 members total with 3 in each unit (The Wind, The Fire, The Earth, and The Water). The profile also notes that Each unit has a unique musical style: Wind (Upbeat and Bright), Fire (Rock), Earth (Rumored to be Indie/Folk), and Water (Rumored to be Hip Hop). Another profile detail is that The Wind unit debuted in 2017, while The Fire unit debuted in 2018.