Boys II Planet is a survival show broadcasted on Mnet. It is a sequel to Girls Planet 999 and Boys Planet. Planet K premiered on July 17 while Planet C started airing on July 18, 2025.

Boys II Planet is based on the themes and aesthetics of space. It consists of two programs, K and C, produced in Korean and Chinese respectively, with both programs following the same format for each contest. The show will create a twin group project, with both groups debuting at the same time. The final line-up will work in two different groups, K and C, and will also work as a complete group.